diff --git a/core/java/android/hardware/usb/UsbDeviceConnection.java b/core/java/android/hardware/usb/UsbDeviceConnection.java
index 60d8cac..7c2e518 100644
--- a/core/java/android/hardware/usb/UsbDeviceConnection.java
+++ b/core/java/android/hardware/usb/UsbDeviceConnection.java
@@ -108,6 +108,34 @@
     }
 
     /**
+     * This is meant to be called by UsbRequest's queue() in order to synchronize on
+     * UsbDeviceConnection's mLock to prevent the connection being closed while queueing.
+     */
+    /* package */ boolean queueRequest(UsbRequest request, ByteBuffer buffer, int length) {
+        synchronized (mLock) {
+            if (!isOpen()) {
+                return false;
+            }
+
+            return request.queueIfConnectionOpen(buffer, length);
+        }
+    }
+
+    /**
+     * This is meant to be called by UsbRequest's queue() in order to synchronize on
+     * UsbDeviceConnection's mLock to prevent the connection being closed while queueing.
+     */
+    /* package */ boolean queueRequest(UsbRequest request, @Nullable ByteBuffer buffer) {
+        synchronized (mLock) {
+            if (!isOpen()) {
+                return false;
+            }
+
+            return request.queueIfConnectionOpen(buffer);
+        }
+    }
+
+    /**
      * Releases all system resources related to the device.
      * Once the object is closed it cannot be used again.
      * The client must call {@link UsbManager#openDevice} again
diff --git a/core/java/android/hardware/usb/UsbRequest.java b/core/java/android/hardware/usb/UsbRequest.java
index 6ac5e8d..beb0f8d 100644
--- a/core/java/android/hardware/usb/UsbRequest.java
+++ b/core/java/android/hardware/usb/UsbRequest.java
@@ -113,11 +113,13 @@
      * Releases all resources related to this request.
      */
     public void close() {
-        if (mNativeContext != 0) {
-            mEndpoint = null;
-            mConnection = null;
-            native_close();
-            mCloseGuard.close();
+        synchronized (mLock) {
+            if (mNativeContext != 0) {
+                mEndpoint = null;
+                mConnection = null;
+                native_close();
+                mCloseGuard.close();
+            }
         }
     }
 
@@ -191,10 +193,32 @@
      */
     @Deprecated
     public boolean queue(ByteBuffer buffer, int length) {
+        UsbDeviceConnection connection = mConnection;
+        if (connection == null) {
+            // The expected exception by CTS Verifier - USB Device test
+            throw new NullPointerException("invalid connection");
+        }
+
+        // Calling into the underlying UsbDeviceConnection to synchronize on its lock, to prevent
+        // the connection being closed while queueing.
+        return connection.queueRequest(this, buffer, length);
+    }
+
+    /**
+     * This is meant to be called from UsbDeviceConnection after synchronizing using the lock over
+     * there, to prevent the connection being closed while queueing.
+     */
+    /* package */ boolean queueIfConnectionOpen(ByteBuffer buffer, int length) {
+        UsbDeviceConnection connection = mConnection;
+        if (connection == null || !connection.isOpen()) {
+            // The expected exception by CTS Verifier - USB Device test
+            throw new NullPointerException("invalid connection");
+        }
+
         boolean out = (mEndpoint.getDirection() == UsbConstants.USB_DIR_OUT);
         boolean result;
 
-        if (mConnection.getContext().getApplicationInfo().targetSdkVersion < Build.VERSION_CODES.P
+        if (connection.getContext().getApplicationInfo().targetSdkVersion < Build.VERSION_CODES.P
                 && length > MAX_USBFS_BUFFER_SIZE) {
             length = MAX_USBFS_BUFFER_SIZE;
         }
@@ -243,6 +267,28 @@
      * @return true if the queueing operation succeeded
      */
     public boolean queue(@Nullable ByteBuffer buffer) {
+        UsbDeviceConnection connection = mConnection;
+        if (connection == null) {
+            // The expected exception by CTS Verifier - USB Device test
+            throw new IllegalStateException("invalid connection");
+        }
+
+        // Calling into the underlying UsbDeviceConnection to synchronize on its lock, to prevent
+        // the connection being closed while queueing.
+        return connection.queueRequest(this, buffer);
+    }
+
+    /**
+     * This is meant to be called from UsbDeviceConnection after synchronizing using the lock over
+     * there, to prevent the connection being closed while queueing.
+     */
+    /* package */ boolean queueIfConnectionOpen(@Nullable ByteBuffer buffer) {
+        UsbDeviceConnection connection = mConnection;
+        if (connection == null || !connection.isOpen()) {
+            // The expected exception by CTS Verifier - USB Device test
+            throw new IllegalStateException("invalid connection");
+        }
+
         // Request need to be initialized
         Preconditions.checkState(mNativeContext != 0, "request is not initialized");
 
@@ -260,7 +306,7 @@
                 mIsUsingNewQueue = true;
                 wasQueued = native_queue(null, 0, 0);
             } else {
-                if (mConnection.getContext().getApplicationInfo().targetSdkVersion
+                if (connection.getContext().getApplicationInfo().targetSdkVersion
                         < Build.VERSION_CODES.P) {
                     // Can only send/receive MAX_USBFS_BUFFER_SIZE bytes at once
                     Preconditions.checkArgumentInRange(buffer.remaining(), 0, MAX_USBFS_BUFFER_SIZE,
@@ -363,11 +409,12 @@
      * @return true if cancelling succeeded
      */
     public boolean cancel() {
-        if (mConnection == null) {
+        UsbDeviceConnection connection = mConnection;
+        if (connection == null) {
             return false;
         }
 
-        return mConnection.cancelRequest(this);
+        return connection.cancelRequest(this);
     }
 
     /**
@@ -382,7 +429,8 @@
      * @return true if cancelling succeeded.
      */
     /* package */ boolean cancelIfOpen() {
-        if (mNativeContext == 0 || (mConnection != null && !mConnection.isOpen())) {
+        UsbDeviceConnection connection = mConnection;
+        if (mNativeContext == 0 || (connection != null && !connection.isOpen())) {
             Log.w(TAG,
                     "Detected attempt to cancel a request on a connection which isn't open");
             return false;
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 6e369d3..c9fd129 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -3344,9 +3344,26 @@
                     }
                 }
 
-                // Fetch all flags for the namespace at once for caching purposes
-                Bundle b = cp.call(cr.getAttributionSource(),
-                        mProviderHolder.mUri.getAuthority(), mCallListCommand, null, args);
+                Bundle b;
+                // b/252663068: if we're in system server and the caller did not call
+                // clearCallingIdentity, the read would fail due to mismatched AttributionSources.
+                // TODO(b/256013480): remove this bypass after fixing the callers in system server.
+                if (namespace.equals(DeviceConfig.NAMESPACE_DEVICE_POLICY_MANAGER)
+                        && Settings.isInSystemServer()
+                        && Binder.getCallingUid() != Process.myUid()) {
+                    final long token = Binder.clearCallingIdentity();
+                    try {
+                        // Fetch all flags for the namespace at once for caching purposes
+                        b = cp.call(cr.getAttributionSource(),
+                                mProviderHolder.mUri.getAuthority(), mCallListCommand, null, args);
+                    } finally {
+                        Binder.restoreCallingIdentity(token);
+                    }
+                } else {
+                    // Fetch all flags for the namespace at once for caching purposes
+                    b = cp.call(cr.getAttributionSource(),
+                            mProviderHolder.mUri.getAuthority(), mCallListCommand, null, args);
+                }
                 if (b == null) {
                     // Invalid response, return an empty map
                     return keyValues;
diff --git a/core/java/com/android/internal/app/chooser/DisplayResolveInfo.java b/core/java/com/android/internal/app/chooser/DisplayResolveInfo.java
index 5f4a9cd..473134e 100644
--- a/core/java/com/android/internal/app/chooser/DisplayResolveInfo.java
+++ b/core/java/com/android/internal/app/chooser/DisplayResolveInfo.java
@@ -172,14 +172,14 @@
 
     @Override
     public boolean startAsCaller(ResolverActivity activity, Bundle options, int userId) {
-        prepareIntentForCrossProfileLaunch(mResolvedIntent, userId);
+        TargetInfo.prepareIntentForCrossProfileLaunch(mResolvedIntent, userId);
         activity.startActivityAsCaller(mResolvedIntent, options, false, userId);
         return true;
     }
 
     @Override
     public boolean startAsUser(Activity activity, Bundle options, UserHandle user) {
-        prepareIntentForCrossProfileLaunch(mResolvedIntent, user.getIdentifier());
+        TargetInfo.prepareIntentForCrossProfileLaunch(mResolvedIntent, user.getIdentifier());
         activity.startActivityAsUser(mResolvedIntent, options, user);
         return false;
     }
@@ -224,13 +224,6 @@
         }
     };
 
-    private static void prepareIntentForCrossProfileLaunch(Intent intent, int targetUserId) {
-        final int currentUserId = UserHandle.myUserId();
-        if (targetUserId != currentUserId) {
-            intent.fixUris(currentUserId);
-        }
-    }
-
     private DisplayResolveInfo(Parcel in) {
         mDisplayLabel = in.readCharSequence();
         mExtendedInfo = in.readCharSequence();
diff --git a/core/java/com/android/internal/app/chooser/SelectableTargetInfo.java b/core/java/com/android/internal/app/chooser/SelectableTargetInfo.java
index 264e4f7..4b9b7cb 100644
--- a/core/java/com/android/internal/app/chooser/SelectableTargetInfo.java
+++ b/core/java/com/android/internal/app/chooser/SelectableTargetInfo.java
@@ -232,6 +232,7 @@
         }
         intent.setComponent(mChooserTarget.getComponentName());
         intent.putExtras(mChooserTarget.getIntentExtras());
+        TargetInfo.prepareIntentForCrossProfileLaunch(intent, userId);
 
         // Important: we will ignore the target security checks in ActivityManager
         // if and only if the ChooserTarget's target package is the same package
diff --git a/core/java/com/android/internal/app/chooser/TargetInfo.java b/core/java/com/android/internal/app/chooser/TargetInfo.java
index f56ab17..7bb7ddc 100644
--- a/core/java/com/android/internal/app/chooser/TargetInfo.java
+++ b/core/java/com/android/internal/app/chooser/TargetInfo.java
@@ -130,4 +130,15 @@
      * @return true if this target should be pinned to the front by the request of the user
      */
     boolean isPinned();
+
+    /**
+     * Fix the URIs in {@code intent} if cross-profile sharing is required. This should be called
+     * before launching the intent as another user.
+     */
+    static void prepareIntentForCrossProfileLaunch(Intent intent, int targetUserId) {
+        final int currentUserId = UserHandle.myUserId();
+        if (targetUserId != currentUserId) {
+            intent.fixUris(currentUserId);
+        }
+    }
 }
diff --git a/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java b/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java
index fd7554f..cd667ca 100644
--- a/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java
+++ b/packages/SettingsProvider/src/com/android/providers/settings/SettingsState.java
@@ -48,6 +48,7 @@
 import android.util.proto.ProtoOutputStream;
 
 import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.FrameworkStatsLog;
 
@@ -376,9 +377,11 @@
             Setting newSetting = new Setting(name, oldSetting.getValue(), null,
                     oldSetting.getPackageName(), oldSetting.getTag(), false,
                     oldSetting.getId());
+            int newSize = getNewMemoryUsagePerPackageLocked(newSetting.getPackageName(), 0,
+                    oldValue, newSetting.getValue(), oldDefaultValue, newSetting.getDefaultValue());
+            checkNewMemoryUsagePerPackageLocked(newSetting.getPackageName(), newSize);
             mSettings.put(name, newSetting);
-            updateMemoryUsagePerPackageLocked(newSetting.getPackageName(), oldValue,
-                    newSetting.getValue(), oldDefaultValue, newSetting.getDefaultValue());
+            updateMemoryUsagePerPackageLocked(newSetting.getPackageName(), newSize);
             scheduleWriteIfNeededLocked();
         }
     }
@@ -410,6 +413,13 @@
         Setting oldState = mSettings.get(name);
         String oldValue = (oldState != null) ? oldState.value : null;
         String oldDefaultValue = (oldState != null) ? oldState.defaultValue : null;
+        String newDefaultValue = makeDefault ? value : oldDefaultValue;
+
+        int newSize = getNewMemoryUsagePerPackageLocked(packageName,
+                oldValue == null ? name.length() : 0 /* deltaKeySize */,
+                oldValue, value, oldDefaultValue, newDefaultValue);
+        checkNewMemoryUsagePerPackageLocked(packageName, newSize);
+
         Setting newState;
 
         if (oldState != null) {
@@ -430,8 +440,7 @@
 
         addHistoricalOperationLocked(HISTORICAL_OPERATION_UPDATE, newState);
 
-        updateMemoryUsagePerPackageLocked(packageName, oldValue, value,
-                oldDefaultValue, newState.getDefaultValue());
+        updateMemoryUsagePerPackageLocked(packageName, newSize);
 
         scheduleWriteIfNeededLocked();
 
@@ -552,13 +561,18 @@
         }
 
         Setting oldState = mSettings.remove(name);
+        if (oldState == null) {
+            return false;
+        }
+        int newSize = getNewMemoryUsagePerPackageLocked(oldState.packageName,
+                -name.length() /* deltaKeySize */,
+                oldState.value, null, oldState.defaultValue, null);
 
         FrameworkStatsLog.write(FrameworkStatsLog.SETTING_CHANGED, name, /* value= */ "",
                 /* newValue= */ "", oldState.value, /* tag */ "", false, getUserIdFromKey(mKey),
                 FrameworkStatsLog.SETTING_CHANGED__REASON__DELETED);
 
-        updateMemoryUsagePerPackageLocked(oldState.packageName, oldState.value,
-                null, oldState.defaultValue, null);
+        updateMemoryUsagePerPackageLocked(oldState.packageName, newSize);
 
         addHistoricalOperationLocked(HISTORICAL_OPERATION_DELETE, oldState);
 
@@ -575,20 +589,23 @@
         }
 
         Setting setting = mSettings.get(name);
+        if (setting == null) {
+            return false;
+        }
 
         Setting oldSetting = new Setting(setting);
         String oldValue = setting.getValue();
         String oldDefaultValue = setting.getDefaultValue();
 
+        int newSize = getNewMemoryUsagePerPackageLocked(setting.packageName, 0, oldValue,
+                oldDefaultValue, oldDefaultValue, oldDefaultValue);
+        checkNewMemoryUsagePerPackageLocked(setting.packageName, newSize);
+
         if (!setting.reset()) {
             return false;
         }
 
-        String newValue = setting.getValue();
-        String newDefaultValue = setting.getDefaultValue();
-
-        updateMemoryUsagePerPackageLocked(setting.packageName, oldValue,
-                newValue, oldDefaultValue, newDefaultValue);
+        updateMemoryUsagePerPackageLocked(setting.packageName, newSize);
 
         addHistoricalOperationLocked(HISTORICAL_OPERATION_RESET, oldSetting);
 
@@ -696,38 +713,49 @@
     }
 
     @GuardedBy("mLock")
-    private void updateMemoryUsagePerPackageLocked(String packageName, String oldValue,
-            String newValue, String oldDefaultValue, String newDefaultValue) {
-        if (mMaxBytesPerAppPackage == MAX_BYTES_PER_APP_PACKAGE_UNLIMITED) {
+    private boolean isExemptFromMemoryUsageCap(String packageName) {
+        return mMaxBytesPerAppPackage == MAX_BYTES_PER_APP_PACKAGE_UNLIMITED
+                || SYSTEM_PACKAGE_NAME.equals(packageName);
+    }
+
+    @GuardedBy("mLock")
+    private void checkNewMemoryUsagePerPackageLocked(String packageName, int newSize)
+            throws IllegalStateException {
+        if (isExemptFromMemoryUsageCap(packageName)) {
             return;
         }
-
-        if (SYSTEM_PACKAGE_NAME.equals(packageName)) {
-            return;
-        }
-
-        final int oldValueSize = (oldValue != null) ? oldValue.length() : 0;
-        final int newValueSize = (newValue != null) ? newValue.length() : 0;
-        final int oldDefaultValueSize = (oldDefaultValue != null) ? oldDefaultValue.length() : 0;
-        final int newDefaultValueSize = (newDefaultValue != null) ? newDefaultValue.length() : 0;
-        final int deltaSize = newValueSize + newDefaultValueSize
-                - oldValueSize - oldDefaultValueSize;
-
-        Integer currentSize = mPackageToMemoryUsage.get(packageName);
-        final int newSize = Math.max((currentSize != null)
-                ? currentSize + deltaSize : deltaSize, 0);
-
         if (newSize > mMaxBytesPerAppPackage) {
             throw new IllegalStateException("You are adding too many system settings. "
                     + "You should stop using system settings for app specific data"
                     + " package: " + packageName);
         }
+    }
 
+    @GuardedBy("mLock")
+    private int getNewMemoryUsagePerPackageLocked(String packageName, int deltaKeySize,
+            String oldValue, String newValue, String oldDefaultValue, String newDefaultValue) {
+        if (isExemptFromMemoryUsageCap(packageName)) {
+            return 0;
+        }
+        final Integer currentSize = mPackageToMemoryUsage.get(packageName);
+        final int oldValueSize = (oldValue != null) ? oldValue.length() : 0;
+        final int newValueSize = (newValue != null) ? newValue.length() : 0;
+        final int oldDefaultValueSize = (oldDefaultValue != null) ? oldDefaultValue.length() : 0;
+        final int newDefaultValueSize = (newDefaultValue != null) ? newDefaultValue.length() : 0;
+        final int deltaSize = deltaKeySize + newValueSize + newDefaultValueSize
+                - oldValueSize - oldDefaultValueSize;
+        return Math.max((currentSize != null) ? currentSize + deltaSize : deltaSize, 0);
+    }
+
+    @GuardedBy("mLock")
+    private void updateMemoryUsagePerPackageLocked(String packageName, int newSize) {
+        if (isExemptFromMemoryUsageCap(packageName)) {
+            return;
+        }
         if (DEBUG) {
             Slog.i(LOG_TAG, "Settings for package: " + packageName
                     + " size: " + newSize + " bytes.");
         }
-
         mPackageToMemoryUsage.put(packageName, newSize);
     }
 
@@ -1556,4 +1584,11 @@
         }
         return false;
     }
+
+    @VisibleForTesting
+    public int getMemoryUsage(String packageName) {
+        synchronized (mLock) {
+            return mPackageToMemoryUsage.getOrDefault(packageName, 0);
+        }
+    }
 }
diff --git a/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsStateTest.java b/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsStateTest.java
index 69eb713..f6d4329 100644
--- a/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsStateTest.java
+++ b/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsStateTest.java
@@ -20,6 +20,8 @@
 import android.util.TypedXmlSerializer;
 import android.util.Xml;
 
+import com.google.common.base.Strings;
+
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileOutputStream;
@@ -276,4 +278,132 @@
         settingsState.setVersionLocked(SettingsState.SETTINGS_VERSION_NEW_ENCODING);
         return settingsState;
     }
+
+    public void testInsertSetting_memoryUsage() {
+        SettingsState settingsState = new SettingsState(getContext(), mLock, mSettingsFile, 1,
+                SettingsState.MAX_BYTES_PER_APP_PACKAGE_UNLIMITED, Looper.getMainLooper());
+        // No exception should be thrown when there is no cap
+        settingsState.insertSettingLocked(SETTING_NAME, Strings.repeat("A", 20001),
+                null, false, "p1");
+        settingsState.deleteSettingLocked(SETTING_NAME);
+
+        settingsState = new SettingsState(getContext(), mLock, mSettingsFile, 1,
+                SettingsState.MAX_BYTES_PER_APP_PACKAGE_LIMITED, Looper.getMainLooper());
+        // System package doesn't have memory usage limit
+        settingsState.insertSettingLocked(SETTING_NAME, Strings.repeat("A", 20001),
+                null, false, SYSTEM_PACKAGE);
+        settingsState.deleteSettingLocked(SETTING_NAME);
+
+        // Should not throw if usage is under the cap
+        settingsState.insertSettingLocked(SETTING_NAME, Strings.repeat("A", 19975),
+                null, false, "p1");
+        settingsState.deleteSettingLocked(SETTING_NAME);
+        try {
+            settingsState.insertSettingLocked(SETTING_NAME, Strings.repeat("A", 20001),
+                    null, false, "p1");
+            fail("Should throw because it exceeded per package memory usage");
+        } catch (IllegalStateException ex) {
+            assertTrue(ex.getMessage().contains("p1"));
+        }
+        try {
+            settingsState.insertSettingLocked(SETTING_NAME, Strings.repeat("A", 20001),
+                    null, false, "p1");
+            fail("Should throw because it exceeded per package memory usage");
+        } catch (IllegalStateException ex) {
+            assertTrue(ex.getMessage().contains("p1"));
+        }
+        assertTrue(settingsState.getSettingLocked(SETTING_NAME).isNull());
+        try {
+            settingsState.insertSettingLocked(Strings.repeat("A", 20001), "",
+                    null, false, "p1");
+            fail("Should throw because it exceeded per package memory usage");
+        } catch (IllegalStateException ex) {
+            assertTrue(ex.getMessage().contains("You are adding too many system settings"));
+        }
+    }
+
+    public void testMemoryUsagePerPackage() {
+        SettingsState settingsState = new SettingsState(getContext(), mLock, mSettingsFile, 1,
+                SettingsState.MAX_BYTES_PER_APP_PACKAGE_LIMITED, Looper.getMainLooper());
+
+        // Test inserting one key with default
+        final String testKey1 = SETTING_NAME;
+        final String testValue1 = Strings.repeat("A", 100);
+        settingsState.insertSettingLocked(testKey1, testValue1, null, true, TEST_PACKAGE);
+        int expectedMemUsage = testKey1.length() + testValue1.length()
+                + testValue1.length() /* size for default */;
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test inserting another key
+        final String testKey2 = SETTING_NAME + "2";
+        settingsState.insertSettingLocked(testKey2, testValue1, null, false, TEST_PACKAGE);
+        expectedMemUsage += testKey2.length() + testValue1.length();
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test updating first key with new default
+        final String testValue2 = Strings.repeat("A", 300);
+        settingsState.insertSettingLocked(testKey1, testValue2, null, true, TEST_PACKAGE);
+        expectedMemUsage += (testValue2.length() - testValue1.length()) * 2;
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test updating first key without new default
+        final String testValue3 = Strings.repeat("A", 50);
+        settingsState.insertSettingLocked(testKey1, testValue3, null, false, TEST_PACKAGE);
+        expectedMemUsage -= testValue2.length() - testValue3.length();
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test updating second key
+        settingsState.insertSettingLocked(testKey2, testValue2, null, false, TEST_PACKAGE);
+        expectedMemUsage -= testValue1.length() - testValue2.length();
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test resetting key
+        settingsState.resetSettingLocked(testKey1);
+        expectedMemUsage += testValue2.length() - testValue3.length();
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test resetting default value
+        settingsState.resetSettingDefaultValueLocked(testKey1);
+        expectedMemUsage -= testValue2.length();
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test deletion
+        settingsState.deleteSettingLocked(testKey2);
+        expectedMemUsage -= testValue2.length() + testKey2.length() /* key is deleted too */;
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test another package with a different key
+        final String testPackage2 = TEST_PACKAGE + "2";
+        final String testKey3 = SETTING_NAME + "3";
+        settingsState.insertSettingLocked(testKey3, testValue1, null, true, testPackage2);
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+        final int expectedMemUsage2 = testKey3.length() + testValue1.length() * 2;
+        assertEquals(expectedMemUsage2, settingsState.getMemoryUsage(testPackage2));
+
+        // Test system package
+        settingsState.insertSettingLocked(testKey1, testValue1, null, true, SYSTEM_PACKAGE);
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+        assertEquals(expectedMemUsage2, settingsState.getMemoryUsage(testPackage2));
+        assertEquals(0, settingsState.getMemoryUsage(SYSTEM_PACKAGE));
+
+        // Test invalid value
+        try {
+            settingsState.insertSettingLocked(testKey1, Strings.repeat("A", 20001), null, false,
+                    TEST_PACKAGE);
+            fail("Should throw because it exceeded per package memory usage");
+        } catch (IllegalStateException ex) {
+            assertTrue(ex.getMessage().contains("You are adding too many system settings"));
+        }
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+
+        // Test invalid key
+        try {
+            settingsState.insertSettingLocked(Strings.repeat("A", 20001), "", null, false,
+                    TEST_PACKAGE);
+            fail("Should throw because it exceeded per package memory usage");
+        } catch (IllegalStateException ex) {
+            assertTrue(ex.getMessage().contains("You are adding too many system settings"));
+        }
+        assertEquals(expectedMemUsage, settingsState.getMemoryUsage(TEST_PACKAGE));
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java b/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java
index ded466a..2727c83 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java
@@ -23,8 +23,8 @@
 import android.annotation.Nullable;
 import android.content.ComponentName;
 import android.content.res.Configuration;
+import android.content.res.Configuration.Orientation;
 import android.metrics.LogMaker;
-import android.util.Log;
 import android.view.View;
 
 import com.android.internal.annotations.VisibleForTesting;
@@ -75,6 +75,7 @@
 
     @Nullable
     private Consumer<Boolean> mMediaVisibilityChangedListener;
+    @Orientation
     private int mLastOrientation;
     private String mCachedSpecs = "";
     @Nullable
@@ -88,21 +89,16 @@
             new QSPanel.OnConfigurationChangedListener() {
                 @Override
                 public void onConfigurationChange(Configuration newConfig) {
+                    mQSLogger.logOnConfigurationChanged(
+                        /* lastOrientation= */ mLastOrientation,
+                        /* newOrientation= */ newConfig.orientation,
+                        /* containerName= */ mView.getDumpableTag());
+
                     mShouldUseSplitNotificationShade =
-                            LargeScreenUtils.shouldUseSplitNotificationShade(getResources());
-                    // Logging to aid the investigation of b/216244185.
-                    Log.d(TAG,
-                            "onConfigurationChange: "
-                                    + "mShouldUseSplitNotificationShade="
-                                    + mShouldUseSplitNotificationShade + ", "
-                                    + "newConfig.windowConfiguration="
-                                    + newConfig.windowConfiguration);
-                    mQSLogger.logOnConfigurationChanged(mLastOrientation, newConfig.orientation,
-                            mView.getDumpableTag());
-                    if (newConfig.orientation != mLastOrientation) {
-                        mLastOrientation = newConfig.orientation;
-                        switchTileLayout(false);
-                    }
+                        LargeScreenUtils.shouldUseSplitNotificationShade(getResources());
+                    mLastOrientation = newConfig.orientation;
+
+                    switchTileLayoutIfNeeded();
                     onConfigurationChanged();
                 }
             };
@@ -334,6 +330,10 @@
         }
     }
 
+    private void switchTileLayoutIfNeeded() {
+        switchTileLayout(/* force= */ false);
+    }
+
     boolean switchTileLayout(boolean force) {
         /* Whether or not the panel currently contains a media player. */
         boolean horizontal = shouldUseHorizontalLayout();
diff --git a/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java b/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java
index 3cad2a0..b847ad0 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java
@@ -277,7 +277,7 @@
 
         // Then the layout changes
         assertThat(mController.shouldUseHorizontalLayout()).isTrue();
-        verify(mHorizontalLayoutListener).run(); // not invoked
+        verify(mHorizontalLayoutListener).run();
 
         // When it is rotated back to portrait
         mConfiguration.orientation = Configuration.ORIENTATION_PORTRAIT;
@@ -300,4 +300,24 @@
         verify(mQSTile).refreshState();
         verify(mOtherTile, never()).refreshState();
     }
+
+    @Test
+    public void configurationChange_onlySplitShadeConfigChanges_horizontalLayoutStatusUpdated() {
+        // Preconditions for horizontal layout
+        when(mMediaHost.getVisible()).thenReturn(true);
+        when(mResources.getBoolean(R.bool.config_use_split_notification_shade)).thenReturn(false);
+        mConfiguration.orientation = Configuration.ORIENTATION_LANDSCAPE;
+        mController.setUsingHorizontalLayoutChangeListener(mHorizontalLayoutListener);
+        mController.mOnConfigurationChangedListener.onConfigurationChange(mConfiguration);
+        assertThat(mController.shouldUseHorizontalLayout()).isTrue();
+        reset(mHorizontalLayoutListener);
+
+        // Only split shade status changes
+        when(mResources.getBoolean(R.bool.config_use_split_notification_shade)).thenReturn(true);
+        mController.mOnConfigurationChangedListener.onConfigurationChange(mConfiguration);
+
+        // Horizontal layout is updated accordingly.
+        assertThat(mController.shouldUseHorizontalLayout()).isFalse();
+        verify(mHorizontalLayoutListener).run();
+    }
 }
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
index 6417db0..29194c5 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -657,25 +657,27 @@
                     userState.mBindingServices.removeIf(filter);
                     userState.mCrashedServices.removeIf(filter);
                     final Iterator<ComponentName> it = userState.mEnabledServices.iterator();
+                    boolean anyServiceRemoved = false;
                     while (it.hasNext()) {
                         final ComponentName comp = it.next();
                         final String compPkg = comp.getPackageName();
                         if (compPkg.equals(packageName)) {
                             it.remove();
-                            // Update the enabled services setting.
-                            persistComponentNamesToSettingLocked(
-                                    Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES,
-                                    userState.mEnabledServices, userId);
-                            // Update the touch exploration granted services setting.
                             userState.mTouchExplorationGrantedServices.remove(comp);
-                            persistComponentNamesToSettingLocked(
-                                    Settings.Secure.
-                                    TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES,
-                                    userState.mTouchExplorationGrantedServices, userId);
-                            onUserStateChangedLocked(userState);
-                            return;
+                            anyServiceRemoved = true;
                         }
                     }
+                    if (anyServiceRemoved) {
+                        // Update the enabled services setting.
+                        persistComponentNamesToSettingLocked(
+                                Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES,
+                                userState.mEnabledServices, userId);
+                        // Update the touch exploration granted services setting.
+                        persistComponentNamesToSettingLocked(
+                                Settings.Secure.TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES,
+                                userState.mTouchExplorationGrantedServices, userId);
+                        onUserStateChangedLocked(userState);
+                    }
                 }
             }
 
diff --git a/services/core/java/com/android/server/am/PendingIntentRecord.java b/services/core/java/com/android/server/am/PendingIntentRecord.java
index bda60ff..8624ee0 100644
--- a/services/core/java/com/android/server/am/PendingIntentRecord.java
+++ b/services/core/java/com/android/server/am/PendingIntentRecord.java
@@ -379,11 +379,16 @@
                 resolvedType = key.requestResolvedType;
             }
 
-            // Apply any launch flags from the ActivityOptions. This is to ensure that the caller
-            // can specify a consistent launch mode even if the PendingIntent is immutable
+            // Apply any launch flags from the ActivityOptions. This is used only by SystemUI
+            // to ensure that we can launch the pending intent with a consistent launch mode even
+            // if the provided PendingIntent is immutable (ie. to force an activity to launch into
+            // a new task, or to launch multiple instances if supported by the app)
             final ActivityOptions opts = ActivityOptions.fromBundle(options);
             if (opts != null) {
-                finalIntent.addFlags(opts.getPendingIntentLaunchFlags());
+                // TODO(b/254490217): Move this check into SafeActivityOptions
+                if (controller.mAtmInternal.isCallerRecents(Binder.getCallingUid())) {
+                    finalIntent.addFlags(opts.getPendingIntentLaunchFlags());
+                }
             }
 
             // Extract options before clearing calling identity
diff --git a/services/core/java/com/android/server/notification/NotificationManagerService.java b/services/core/java/com/android/server/notification/NotificationManagerService.java
index f11801f..971a312 100755
--- a/services/core/java/com/android/server/notification/NotificationManagerService.java
+++ b/services/core/java/com/android/server/notification/NotificationManagerService.java
@@ -1977,34 +1977,39 @@
             return (haystack & needle) != 0;
         }
 
-        public boolean isInLockDownMode() {
-            return mIsInLockDownMode;
+        // Return whether the user is in lockdown mode.
+        // If the flag is not set, we assume the user is not in lockdown.
+        public boolean isInLockDownMode(int userId) {
+            return mUserInLockDownMode.get(userId, false);
         }
 
         @Override
         public synchronized void onStrongAuthRequiredChanged(int userId) {
             boolean userInLockDownModeNext = containsFlag(getStrongAuthForUser(userId),
                     STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN);
-            mUserInLockDownMode.put(userId, userInLockDownModeNext);
-            boolean isInLockDownModeNext = mUserInLockDownMode.indexOfValue(true) != -1;
 
-            if (mIsInLockDownMode == isInLockDownModeNext) {
+            // Nothing happens if the lockdown mode of userId keeps the same.
+            if (userInLockDownModeNext == isInLockDownMode(userId)) {
                 return;
             }
 
-            if (isInLockDownModeNext) {
-                cancelNotificationsWhenEnterLockDownMode();
+            // When the lockdown mode is changed, we perform the following steps.
+            // If the userInLockDownModeNext is true, all the function calls to
+            // notifyPostedLocked and notifyRemovedLocked will not be executed.
+            // The cancelNotificationsWhenEnterLockDownMode calls notifyRemovedLocked
+            // and postNotificationsWhenExitLockDownMode calls notifyPostedLocked.
+            // So we shall call cancelNotificationsWhenEnterLockDownMode before
+            // we set mUserInLockDownMode as true.
+            // On the other hand, if the userInLockDownModeNext is false, we shall call
+            // postNotificationsWhenExitLockDownMode after we put false into mUserInLockDownMode
+            if (userInLockDownModeNext) {
+                cancelNotificationsWhenEnterLockDownMode(userId);
             }
 
-            // When the mIsInLockDownMode is true, both notifyPostedLocked and
-            // notifyRemovedLocked will be dismissed. So we shall call
-            // cancelNotificationsWhenEnterLockDownMode before we set mIsInLockDownMode
-            // as true and call postNotificationsWhenExitLockDownMode after we set
-            // mIsInLockDownMode as false.
-            mIsInLockDownMode = isInLockDownModeNext;
+            mUserInLockDownMode.put(userId, userInLockDownModeNext);
 
-            if (!isInLockDownModeNext) {
-                postNotificationsWhenExitLockDownMode();
+            if (!userInLockDownModeNext) {
+                postNotificationsWhenExitLockDownMode(userId);
             }
         }
     }
@@ -4953,16 +4958,7 @@
             }
             enforcePolicyAccess(Binder.getCallingUid(), "addAutomaticZenRule");
 
-            // If the caller is system, take the package name from the rule's owner rather than
-            // from the caller's package.
-            String rulePkg = pkg;
-            if (isCallingUidSystem()) {
-                if (automaticZenRule.getOwner() != null) {
-                    rulePkg = automaticZenRule.getOwner().getPackageName();
-                }
-            }
-
-            return mZenModeHelper.addAutomaticZenRule(rulePkg, automaticZenRule,
+            return mZenModeHelper.addAutomaticZenRule(pkg, automaticZenRule,
                     "addAutomaticZenRule");
         }
 
@@ -9671,11 +9667,14 @@
         }
     }
 
-    private void cancelNotificationsWhenEnterLockDownMode() {
+    private void cancelNotificationsWhenEnterLockDownMode(int userId) {
         synchronized (mNotificationLock) {
             int numNotifications = mNotificationList.size();
             for (int i = 0; i < numNotifications; i++) {
                 NotificationRecord rec = mNotificationList.get(i);
+                if (rec.getUser().getIdentifier() != userId) {
+                    continue;
+                }
                 mListeners.notifyRemovedLocked(rec, REASON_CANCEL_ALL,
                         rec.getStats());
             }
@@ -9683,14 +9682,23 @@
         }
     }
 
-    private void postNotificationsWhenExitLockDownMode() {
+    private void postNotificationsWhenExitLockDownMode(int userId) {
         synchronized (mNotificationLock) {
             int numNotifications = mNotificationList.size();
+            // Set the delay to spread out the burst of notifications.
+            long delay = 0;
             for (int i = 0; i < numNotifications; i++) {
                 NotificationRecord rec = mNotificationList.get(i);
-                mListeners.notifyPostedLocked(rec, rec);
+                if (rec.getUser().getIdentifier() != userId) {
+                    continue;
+                }
+                mHandler.postDelayed(() -> {
+                    synchronized (mNotificationLock) {
+                        mListeners.notifyPostedLocked(rec, rec);
+                    }
+                }, delay);
+                delay += 20;
             }
-
         }
     }
 
@@ -9869,6 +9877,9 @@
 
         for (int i = 0; i < N; i++) {
             NotificationRecord record = mNotificationList.get(i);
+            if (isInLockDownMode(record.getUser().getIdentifier())) {
+                continue;
+            }
             if (!isVisibleToListener(record.getSbn(), record.getNotificationType(), info)) {
                 continue;
             }
@@ -9910,8 +9921,8 @@
                 rankings.toArray(new NotificationListenerService.Ranking[0]));
     }
 
-    boolean isInLockDownMode() {
-        return mStrongAuthTracker.isInLockDownMode();
+    boolean isInLockDownMode(int userId) {
+        return mStrongAuthTracker.isInLockDownMode(userId);
     }
 
     boolean hasCompanionDevice(ManagedServiceInfo info) {
@@ -10967,7 +10978,7 @@
         @GuardedBy("mNotificationLock")
         void notifyPostedLocked(NotificationRecord r, NotificationRecord old,
                 boolean notifyAllListeners) {
-            if (isInLockDownMode()) {
+            if (isInLockDownMode(r.getUser().getIdentifier())) {
                 return;
             }
 
@@ -11073,7 +11084,7 @@
         @GuardedBy("mNotificationLock")
         public void notifyRemovedLocked(NotificationRecord r, int reason,
                 NotificationStats notificationStats) {
-            if (isInLockDownMode()) {
+            if (isInLockDownMode(r.getUser().getIdentifier())) {
                 return;
             }
 
@@ -11122,10 +11133,6 @@
          */
         @GuardedBy("mNotificationLock")
         public void notifyRankingUpdateLocked(List<NotificationRecord> changedHiddenNotifications) {
-            if (isInLockDownMode()) {
-                return;
-            }
-
             boolean isHiddenRankingUpdate = changedHiddenNotifications != null
                     && changedHiddenNotifications.size() > 0;
             // TODO (b/73052211): if the ranking update changed the notification type,
diff --git a/services/core/java/com/android/server/notification/ZenModeHelper.java b/services/core/java/com/android/server/notification/ZenModeHelper.java
index 4c23ab8..d426679 100644
--- a/services/core/java/com/android/server/notification/ZenModeHelper.java
+++ b/services/core/java/com/android/server/notification/ZenModeHelper.java
@@ -326,7 +326,7 @@
 
     public String addAutomaticZenRule(String pkg, AutomaticZenRule automaticZenRule,
             String reason) {
-        if (!ZenModeConfig.SYSTEM_AUTHORITY.equals(pkg)) {
+        if (!isSystemRule(automaticZenRule)) {
             PackageItemInfo component = getServiceInfo(automaticZenRule.getOwner());
             if (component == null) {
                 component = getActivityInfo(automaticZenRule.getConfigurationActivity());
@@ -582,6 +582,11 @@
         }
     }
 
+    private boolean isSystemRule(AutomaticZenRule rule) {
+        return rule.getOwner() != null
+                && ZenModeConfig.SYSTEM_AUTHORITY.equals(rule.getOwner().getPackageName());
+    }
+
     private ServiceInfo getServiceInfo(ComponentName owner) {
         Intent queryIntent = new Intent();
         queryIntent.setComponent(owner);
diff --git a/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java b/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java
index 014d580..554e269 100644
--- a/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java
+++ b/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java
@@ -644,8 +644,8 @@
             Permission bp = mRegistry.getPermission(info.name);
             added = bp == null;
             int fixedLevel = PermissionInfo.fixProtectionLevel(info.protectionLevel);
+            enforcePermissionCapLocked(info, tree);
             if (added) {
-                enforcePermissionCapLocked(info, tree);
                 bp = new Permission(info.name, tree.getPackageName(), Permission.TYPE_DYNAMIC);
             } else if (!bp.isDynamic()) {
                 throw new SecurityException("Not allowed to modify non-dynamic permission "
@@ -2136,6 +2136,46 @@
     }
 
     /**
+     * If the package was below api 23, got the SYSTEM_ALERT_WINDOW permission automatically, and
+     * then updated past api 23, and the app does not satisfy any of the other SAW permission flags,
+     * the permission should be revoked.
+     *
+     * @param newPackage The new package that was installed
+     * @param oldPackage The old package that was updated
+     */
+    private void revokeSystemAlertWindowIfUpgradedPast23(
+            @NonNull AndroidPackage newPackage,
+            @NonNull AndroidPackage oldPackage) {
+        if (oldPackage.getTargetSdkVersion() >= Build.VERSION_CODES.M
+                || newPackage.getTargetSdkVersion() < Build.VERSION_CODES.M
+                || !newPackage.getRequestedPermissions()
+                .contains(Manifest.permission.SYSTEM_ALERT_WINDOW)) {
+            return;
+        }
+
+        Permission saw;
+        synchronized (mLock) {
+            saw = mRegistry.getPermission(Manifest.permission.SYSTEM_ALERT_WINDOW);
+        }
+        final PackageStateInternal ps =
+                mPackageManagerInt.getPackageStateInternal(newPackage.getPackageName());
+        if (shouldGrantPermissionByProtectionFlags(newPackage, ps, saw, new ArraySet<>())
+                || shouldGrantPermissionBySignature(newPackage, saw)) {
+            return;
+        }
+        for (int userId : getAllUserIds()) {
+            try {
+                revokePermissionFromPackageForUser(newPackage.getPackageName(),
+                        Manifest.permission.SYSTEM_ALERT_WINDOW, false, userId,
+                        mDefaultPermissionCallback);
+            } catch (IllegalStateException | SecurityException e) {
+                Log.e(TAG, "unable to revoke SYSTEM_ALERT_WINDOW for "
+                        + newPackage.getPackageName() + " user " + userId, e);
+            }
+        }
+    }
+
+    /**
      * We might auto-grant permissions if any permission of the group is already granted. Hence if
      * the group of a granted permission changes we need to revoke it to avoid having permissions of
      * the new group auto-granted.
@@ -4661,6 +4701,7 @@
                 if (hasOldPkg) {
                     revokeRuntimePermissionsIfGroupChangedInternal(pkg, oldPkg);
                     revokeStoragePermissionsIfScopeExpandedInternal(pkg, oldPkg);
+                    revokeSystemAlertWindowIfUpgradedPast23(pkg, oldPkg);
                 }
                 if (hasPermissionDefinitionChanges) {
                     revokeRuntimePermissionsIfPermissionDefinitionChangedInternal(
diff --git a/services/core/java/com/android/server/wm/AppTaskImpl.java b/services/core/java/com/android/server/wm/AppTaskImpl.java
index e80c260..0bfc48b 100644
--- a/services/core/java/com/android/server/wm/AppTaskImpl.java
+++ b/services/core/java/com/android/server/wm/AppTaskImpl.java
@@ -98,7 +98,7 @@
                     throw new IllegalArgumentException("Unable to find task ID " + mTaskId);
                 }
                 return mService.getRecentTasks().createRecentTaskInfo(task,
-                        false /* stripExtras */);
+                        false /* stripExtras */, true /* getTasksAllowed */);
             } finally {
                 Binder.restoreCallingIdentity(origId);
             }
diff --git a/services/core/java/com/android/server/wm/RecentTasks.java b/services/core/java/com/android/server/wm/RecentTasks.java
index 4860762..1fc061b 100644
--- a/services/core/java/com/android/server/wm/RecentTasks.java
+++ b/services/core/java/com/android/server/wm/RecentTasks.java
@@ -976,7 +976,7 @@
                 continue;
             }
 
-            res.add(createRecentTaskInfo(task, true /* stripExtras */));
+            res.add(createRecentTaskInfo(task, true /* stripExtras */, getTasksAllowed));
         }
         return res;
     }
@@ -1895,7 +1895,8 @@
     /**
      * Creates a new RecentTaskInfo from a Task.
      */
-    ActivityManager.RecentTaskInfo createRecentTaskInfo(Task tr, boolean stripExtras) {
+    ActivityManager.RecentTaskInfo createRecentTaskInfo(Task tr, boolean stripExtras,
+            boolean getTasksAllowed) {
         final ActivityManager.RecentTaskInfo rti = new ActivityManager.RecentTaskInfo();
         // If the recent Task is detached, we consider it will be re-attached to the default
         // TaskDisplayArea because we currently only support recent overview in the default TDA.
@@ -1907,6 +1908,9 @@
         rti.id = rti.isRunning ? rti.taskId : INVALID_TASK_ID;
         rti.persistentId = rti.taskId;
         rti.lastSnapshotData.set(tr.mLastTaskSnapshotData);
+        if (!getTasksAllowed) {
+            Task.trimIneffectiveInfo(tr, rti);
+        }
 
         // Fill in organized child task info for the task created by organizer.
         if (tr.mCreatedByOrganizer) {
diff --git a/services/core/java/com/android/server/wm/RunningTasks.java b/services/core/java/com/android/server/wm/RunningTasks.java
index 120fec0..0e60274 100644
--- a/services/core/java/com/android/server/wm/RunningTasks.java
+++ b/services/core/java/com/android/server/wm/RunningTasks.java
@@ -142,6 +142,10 @@
         task.fillTaskInfo(rti, !mKeepIntentExtra);
         // Fill in some deprecated values
         rti.id = rti.taskId;
+
+        if (!mAllowed) {
+            Task.trimIneffectiveInfo(task, rti);
+        }
         return rti;
     }
 }
diff --git a/services/core/java/com/android/server/wm/Task.java b/services/core/java/com/android/server/wm/Task.java
index aede32c..7dc6f95 100644
--- a/services/core/java/com/android/server/wm/Task.java
+++ b/services/core/java/com/android/server/wm/Task.java
@@ -3446,6 +3446,27 @@
         info.isSleeping = shouldSleepActivities();
     }
 
+    /**
+     * Removes the activity info if the activity belongs to a different uid, which is
+     * different from the app that hosts the task.
+     */
+    static void trimIneffectiveInfo(Task task, TaskInfo info) {
+        final ActivityRecord baseActivity = task.getActivity(r -> !r.finishing,
+                false /* traverseTopToBottom */);
+        final int baseActivityUid =
+                baseActivity != null ? baseActivity.getUid() : task.effectiveUid;
+
+        if (info.topActivityInfo != null
+                && task.effectiveUid != info.topActivityInfo.applicationInfo.uid) {
+            info.topActivity = null;
+            info.topActivityInfo = null;
+        }
+
+        if (task.effectiveUid != baseActivityUid) {
+            info.baseActivity = null;
+        }
+    }
+
     @Nullable PictureInPictureParams getPictureInPictureParams() {
         final Task topTask = getTopMostTask();
         if (topTask == null) return null;
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java b/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java
index c5131c8..57e403c 100644
--- a/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java
@@ -435,63 +435,112 @@
 
     @Test
     public void testNotifyPostedLockedInLockdownMode() {
-        NotificationRecord r = mock(NotificationRecord.class);
-        NotificationRecord old = mock(NotificationRecord.class);
+        NotificationRecord r0 = mock(NotificationRecord.class);
+        NotificationRecord old0 = mock(NotificationRecord.class);
+        UserHandle uh0 = mock(UserHandle.class);
 
-        // before the lockdown mode
-        when(mNm.isInLockDownMode()).thenReturn(false);
-        mListeners.notifyPostedLocked(r, old, true);
-        mListeners.notifyPostedLocked(r, old, false);
-        verify(r, atLeast(2)).getSbn();
+        NotificationRecord r1 = mock(NotificationRecord.class);
+        NotificationRecord old1 = mock(NotificationRecord.class);
+        UserHandle uh1 = mock(UserHandle.class);
 
-        // in the lockdown mode
-        reset(r);
-        reset(old);
-        when(mNm.isInLockDownMode()).thenReturn(true);
-        mListeners.notifyPostedLocked(r, old, true);
-        mListeners.notifyPostedLocked(r, old, false);
-        verify(r, never()).getSbn();
-    }
+        // Neither user0 and user1 is in the lockdown mode
+        when(r0.getUser()).thenReturn(uh0);
+        when(uh0.getIdentifier()).thenReturn(0);
+        when(mNm.isInLockDownMode(0)).thenReturn(false);
 
-    @Test
-    public void testnotifyRankingUpdateLockedInLockdownMode() {
-        List chn = mock(List.class);
+        when(r1.getUser()).thenReturn(uh1);
+        when(uh1.getIdentifier()).thenReturn(1);
+        when(mNm.isInLockDownMode(1)).thenReturn(false);
 
-        // before the lockdown mode
-        when(mNm.isInLockDownMode()).thenReturn(false);
-        mListeners.notifyRankingUpdateLocked(chn);
-        verify(chn, atLeast(1)).size();
+        mListeners.notifyPostedLocked(r0, old0, true);
+        mListeners.notifyPostedLocked(r0, old0, false);
+        verify(r0, atLeast(2)).getSbn();
 
-        // in the lockdown mode
-        reset(chn);
-        when(mNm.isInLockDownMode()).thenReturn(true);
-        mListeners.notifyRankingUpdateLocked(chn);
-        verify(chn, never()).size();
+        mListeners.notifyPostedLocked(r1, old1, true);
+        mListeners.notifyPostedLocked(r1, old1, false);
+        verify(r1, atLeast(2)).getSbn();
+
+        // Reset
+        reset(r0);
+        reset(old0);
+        reset(r1);
+        reset(old1);
+
+        // Only user 0 is in the lockdown mode
+        when(r0.getUser()).thenReturn(uh0);
+        when(uh0.getIdentifier()).thenReturn(0);
+        when(mNm.isInLockDownMode(0)).thenReturn(true);
+
+        when(r1.getUser()).thenReturn(uh1);
+        when(uh1.getIdentifier()).thenReturn(1);
+        when(mNm.isInLockDownMode(1)).thenReturn(false);
+
+        mListeners.notifyPostedLocked(r0, old0, true);
+        mListeners.notifyPostedLocked(r0, old0, false);
+        verify(r0, never()).getSbn();
+
+        mListeners.notifyPostedLocked(r1, old1, true);
+        mListeners.notifyPostedLocked(r1, old1, false);
+        verify(r1, atLeast(2)).getSbn();
     }
 
     @Test
     public void testNotifyRemovedLockedInLockdownMode() throws NoSuchFieldException {
-        NotificationRecord r = mock(NotificationRecord.class);
-        NotificationStats rs = mock(NotificationStats.class);
+        NotificationRecord r0 = mock(NotificationRecord.class);
+        NotificationStats rs0 = mock(NotificationStats.class);
+        UserHandle uh0 = mock(UserHandle.class);
+
+        NotificationRecord r1 = mock(NotificationRecord.class);
+        NotificationStats rs1 = mock(NotificationStats.class);
+        UserHandle uh1 = mock(UserHandle.class);
+
         StatusBarNotification sbn = mock(StatusBarNotification.class);
         FieldSetter.setField(mNm,
                 NotificationManagerService.class.getDeclaredField("mHandler"),
                 mock(NotificationManagerService.WorkerHandler.class));
 
-        // before the lockdown mode
-        when(mNm.isInLockDownMode()).thenReturn(false);
-        when(r.getSbn()).thenReturn(sbn);
-        mListeners.notifyRemovedLocked(r, 0, rs);
-        mListeners.notifyRemovedLocked(r, 0, rs);
-        verify(r, atLeast(2)).getSbn();
+        // Neither user0 and user1 is in the lockdown mode
+        when(r0.getUser()).thenReturn(uh0);
+        when(uh0.getIdentifier()).thenReturn(0);
+        when(mNm.isInLockDownMode(0)).thenReturn(false);
+        when(r0.getSbn()).thenReturn(sbn);
 
-        // in the lockdown mode
-        reset(r);
-        reset(rs);
-        when(mNm.isInLockDownMode()).thenReturn(true);
-        when(r.getSbn()).thenReturn(sbn);
-        mListeners.notifyRemovedLocked(r, 0, rs);
-        mListeners.notifyRemovedLocked(r, 0, rs);
-        verify(r, never()).getSbn();
+        when(r1.getUser()).thenReturn(uh1);
+        when(uh1.getIdentifier()).thenReturn(1);
+        when(mNm.isInLockDownMode(1)).thenReturn(false);
+        when(r1.getSbn()).thenReturn(sbn);
+
+        mListeners.notifyRemovedLocked(r0, 0, rs0);
+        mListeners.notifyRemovedLocked(r0, 0, rs0);
+        verify(r0, atLeast(2)).getSbn();
+
+        mListeners.notifyRemovedLocked(r1, 0, rs1);
+        mListeners.notifyRemovedLocked(r1, 0, rs1);
+        verify(r1, atLeast(2)).getSbn();
+
+        // Reset
+        reset(r0);
+        reset(rs0);
+        reset(r1);
+        reset(rs1);
+
+        // Only user 0 is in the lockdown mode
+        when(r0.getUser()).thenReturn(uh0);
+        when(uh0.getIdentifier()).thenReturn(0);
+        when(mNm.isInLockDownMode(0)).thenReturn(true);
+        when(r0.getSbn()).thenReturn(sbn);
+
+        when(r1.getUser()).thenReturn(uh1);
+        when(uh1.getIdentifier()).thenReturn(1);
+        when(mNm.isInLockDownMode(1)).thenReturn(false);
+        when(r1.getSbn()).thenReturn(sbn);
+
+        mListeners.notifyRemovedLocked(r0, 0, rs0);
+        mListeners.notifyRemovedLocked(r0, 0, rs0);
+        verify(r0, never()).getSbn();
+
+        mListeners.notifyRemovedLocked(r1, 0, rs1);
+        mListeners.notifyRemovedLocked(r1, 0, rs1);
+        verify(r1, atLeast(2)).getSbn();
     }
 }
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java b/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
index a545c83..7df4b57 100755
--- a/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
@@ -174,6 +174,7 @@
 import android.service.notification.ConversationChannelWrapper;
 import android.service.notification.NotificationListenerFilter;
 import android.service.notification.NotificationListenerService;
+import android.service.notification.NotificationRankingUpdate;
 import android.service.notification.NotificationStats;
 import android.service.notification.StatusBarNotification;
 import android.service.notification.ZenPolicy;
@@ -7548,43 +7549,6 @@
     }
 
     @Test
-    public void testAddAutomaticZenRule_systemCallTakesPackageFromOwner() throws Exception {
-        mService.isSystemUid = true;
-        ZenModeHelper mockZenModeHelper = mock(ZenModeHelper.class);
-        when(mConditionProviders.isPackageOrComponentAllowed(anyString(), anyInt()))
-                .thenReturn(true);
-        mService.setZenHelper(mockZenModeHelper);
-        ComponentName owner = new ComponentName("android", "ProviderName");
-        ZenPolicy zenPolicy = new ZenPolicy.Builder().allowAlarms(true).build();
-        boolean isEnabled = true;
-        AutomaticZenRule rule = new AutomaticZenRule("test", owner, owner, mock(Uri.class),
-                zenPolicy, NotificationManager.INTERRUPTION_FILTER_PRIORITY, isEnabled);
-        mBinderService.addAutomaticZenRule(rule, "com.android.settings");
-
-        // verify that zen mode helper gets passed in a package name of "android"
-        verify(mockZenModeHelper).addAutomaticZenRule(eq("android"), eq(rule), anyString());
-    }
-
-    @Test
-    public void testAddAutomaticZenRule_nonSystemCallTakesPackageFromArg() throws Exception {
-        mService.isSystemUid = false;
-        ZenModeHelper mockZenModeHelper = mock(ZenModeHelper.class);
-        when(mConditionProviders.isPackageOrComponentAllowed(anyString(), anyInt()))
-                .thenReturn(true);
-        mService.setZenHelper(mockZenModeHelper);
-        ComponentName owner = new ComponentName("android", "ProviderName");
-        ZenPolicy zenPolicy = new ZenPolicy.Builder().allowAlarms(true).build();
-        boolean isEnabled = true;
-        AutomaticZenRule rule = new AutomaticZenRule("test", owner, owner, mock(Uri.class),
-                zenPolicy, NotificationManager.INTERRUPTION_FILTER_PRIORITY, isEnabled);
-        mBinderService.addAutomaticZenRule(rule, "another.package");
-
-        // verify that zen mode helper gets passed in the package name from the arg, not the owner
-        verify(mockZenModeHelper).addAutomaticZenRule(
-                eq("another.package"), eq(rule), anyString());
-    }
-
-    @Test
     public void testAreNotificationsEnabledForPackage() throws Exception {
         mBinderService.areNotificationsEnabledForPackage(mContext.getPackageName(),
                 mUid);
@@ -9781,10 +9745,10 @@
         mStrongAuthTracker.setGetStrongAuthForUserReturnValue(
                 STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN);
         mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
-        assertTrue(mStrongAuthTracker.isInLockDownMode());
-        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(0);
+        assertTrue(mStrongAuthTracker.isInLockDownMode(mContext.getUserId()));
+        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(mContext.getUserId());
         mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
-        assertFalse(mStrongAuthTracker.isInLockDownMode());
+        assertFalse(mStrongAuthTracker.isInLockDownMode(mContext.getUserId()));
     }
 
     @Test
@@ -9800,8 +9764,8 @@
         // when entering the lockdown mode, cancel the 2 notifications.
         mStrongAuthTracker.setGetStrongAuthForUserReturnValue(
                 STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN);
-        mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
-        assertTrue(mStrongAuthTracker.isInLockDownMode());
+        mStrongAuthTracker.onStrongAuthRequiredChanged(0);
+        assertTrue(mStrongAuthTracker.isInLockDownMode(0));
 
         // the notifyRemovedLocked function is called twice due to REASON_CANCEL_ALL.
         ArgumentCaptor<Integer> captor = ArgumentCaptor.forClass(Integer.class);
@@ -9810,10 +9774,46 @@
 
         // exit lockdown mode.
         mStrongAuthTracker.setGetStrongAuthForUserReturnValue(0);
-        mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId());
+        mStrongAuthTracker.onStrongAuthRequiredChanged(0);
+        assertFalse(mStrongAuthTracker.isInLockDownMode(0));
 
         // the notifyPostedLocked function is called twice.
-        verify(mListeners, times(2)).notifyPostedLocked(any(), any());
+        verify(mWorkerHandler, times(2)).postDelayed(any(Runnable.class), anyLong());
+        //verify(mListeners, times(2)).notifyPostedLocked(any(), any());
+    }
+
+    @Test
+    public void testMakeRankingUpdateLockedInLockDownMode() {
+        // post 2 notifications from a same package
+        NotificationRecord pkgA = new NotificationRecord(mContext,
+                generateSbn("a", 1000, 9, 0), mTestNotificationChannel);
+        mService.addNotification(pkgA);
+        NotificationRecord pkgB = new NotificationRecord(mContext,
+                generateSbn("a", 1000, 9, 1), mTestNotificationChannel);
+        mService.addNotification(pkgB);
+
+        mService.setIsVisibleToListenerReturnValue(true);
+        NotificationRankingUpdate nru = mService.makeRankingUpdateLocked(null);
+        assertEquals(2, nru.getRankingMap().getOrderedKeys().length);
+
+        // when only user 0 entering the lockdown mode, its notification will be suppressed.
+        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(
+                STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN);
+        mStrongAuthTracker.onStrongAuthRequiredChanged(0);
+        assertTrue(mStrongAuthTracker.isInLockDownMode(0));
+        assertFalse(mStrongAuthTracker.isInLockDownMode(1));
+
+        nru = mService.makeRankingUpdateLocked(null);
+        assertEquals(1, nru.getRankingMap().getOrderedKeys().length);
+
+        // User 0 exits lockdown mode. Its notification will be resumed.
+        mStrongAuthTracker.setGetStrongAuthForUserReturnValue(0);
+        mStrongAuthTracker.onStrongAuthRequiredChanged(0);
+        assertFalse(mStrongAuthTracker.isInLockDownMode(0));
+        assertFalse(mStrongAuthTracker.isInLockDownMode(1));
+
+        nru = mService.makeRankingUpdateLocked(null);
+        assertEquals(2, nru.getRankingMap().getOrderedKeys().length);
     }
 
     @Test
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/TestableNotificationManagerService.java b/services/tests/uiservicestests/src/com/android/server/notification/TestableNotificationManagerService.java
index b49e5cb..8cf74fb 100644
--- a/services/tests/uiservicestests/src/com/android/server/notification/TestableNotificationManagerService.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/TestableNotificationManagerService.java
@@ -19,10 +19,12 @@
 import android.companion.ICompanionDeviceManager;
 import android.content.ComponentName;
 import android.content.Context;
+import android.service.notification.StatusBarNotification;
 
 import androidx.annotation.Nullable;
 
 import com.android.internal.logging.InstanceIdSequence;
+import com.android.server.notification.ManagedServices.ManagedServiceInfo;
 
 import java.util.HashSet;
 import java.util.Set;
@@ -37,6 +39,9 @@
     @Nullable
     NotificationAssistantAccessGrantedCallback mNotificationAssistantAccessGrantedCallback;
 
+    @Nullable
+    Boolean mIsVisibleToListenerReturnValue = null;
+
     TestableNotificationManagerService(Context context, NotificationRecordLogger logger,
             InstanceIdSequence notificationInstanceIdSequence) {
         super(context, logger, notificationInstanceIdSequence);
@@ -119,6 +124,19 @@
         mShowReviewPermissionsNotification = setting;
     }
 
+    protected void setIsVisibleToListenerReturnValue(boolean value) {
+        mIsVisibleToListenerReturnValue = value;
+    }
+
+    @Override
+    boolean isVisibleToListener(StatusBarNotification sbn, int notificationType,
+            ManagedServiceInfo listener) {
+        if (mIsVisibleToListenerReturnValue != null) {
+            return mIsVisibleToListenerReturnValue;
+        }
+        return super.isVisibleToListener(sbn, notificationType, listener);
+    }
+
     public class StrongAuthTrackerFake extends NotificationManagerService.StrongAuthTracker {
         private int mGetStrongAuthForUserReturnValue = 0;
         StrongAuthTrackerFake(Context context) {
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/ZenModeHelperTest.java b/services/tests/uiservicestests/src/com/android/server/notification/ZenModeHelperTest.java
index 2ccdcaa..4550b56 100644
--- a/services/tests/uiservicestests/src/com/android/server/notification/ZenModeHelperTest.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/ZenModeHelperTest.java
@@ -1672,36 +1672,6 @@
     }
 
     @Test
-    public void testAddAutomaticZenRule_claimedSystemOwner() {
-        // Make sure anything that claims to have a "system" owner but not actually part of the
-        // system package still gets limited on number of rules
-        for (int i = 0; i < RULE_LIMIT_PER_PACKAGE; i++) {
-            ScheduleInfo si = new ScheduleInfo();
-            si.startHour = i;
-            AutomaticZenRule zenRule = new AutomaticZenRule("name" + i,
-                    new ComponentName("android", "ScheduleConditionProvider" + i),
-                    null, // configuration activity
-                    ZenModeConfig.toScheduleConditionId(si),
-                    new ZenPolicy.Builder().build(),
-                    NotificationManager.INTERRUPTION_FILTER_PRIORITY, true);
-            String id = mZenModeHelperSpy.addAutomaticZenRule("pkgname", zenRule, "test");
-            assertNotNull(id);
-        }
-        try {
-            AutomaticZenRule zenRule = new AutomaticZenRule("name",
-                    new ComponentName("android", "ScheduleConditionProviderFinal"),
-                    null, // configuration activity
-                    ZenModeConfig.toScheduleConditionId(new ScheduleInfo()),
-                    new ZenPolicy.Builder().build(),
-                    NotificationManager.INTERRUPTION_FILTER_PRIORITY, true);
-            String id = mZenModeHelperSpy.addAutomaticZenRule("pkgname", zenRule, "test");
-            fail("allowed too many rules to be created");
-        } catch (IllegalArgumentException e) {
-            // yay
-        }
-    }
-
-    @Test
     public void testAddAutomaticZenRule_CA() {
         AutomaticZenRule zenRule = new AutomaticZenRule("name",
                 null,
diff --git a/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java b/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java
index adf694c..0462e1b 100644
--- a/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java
+++ b/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java
@@ -30,6 +30,7 @@
 import static android.content.pm.ActivityInfo.LAUNCH_MULTIPLE;
 import static android.content.pm.ActivityInfo.LAUNCH_SINGLE_INSTANCE;
 import static android.content.res.Configuration.ORIENTATION_PORTRAIT;
+import static android.os.Process.NOBODY_UID;
 
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doNothing;
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
@@ -1220,20 +1221,34 @@
 
     @Test
     public void testCreateRecentTaskInfo_detachedTask() {
-        final Task task = createTaskBuilder(".Task").setCreateActivity(true).build();
+        final Task task = createTaskBuilder(".Task").build();
+        new ActivityBuilder(mSupervisor.mService)
+                .setTask(task)
+                .setUid(NOBODY_UID)
+                .setComponent(getUniqueComponentName())
+                .build();
         final TaskDisplayArea tda = task.getDisplayArea();
 
         assertTrue(task.isAttached());
         assertTrue(task.supportsMultiWindow());
 
-        RecentTaskInfo info = mRecentTasks.createRecentTaskInfo(task, true);
+        RecentTaskInfo info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+                true /* getTasksAllowed */);
 
         assertTrue(info.supportsMultiWindow);
 
+        info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+                false /* getTasksAllowed */);
+
+        assertTrue(info.topActivity == null);
+        assertTrue(info.topActivityInfo == null);
+        assertTrue(info.baseActivity == null);
+
         // The task can be put in split screen even if it is not attached now.
         task.removeImmediately();
 
-        info = mRecentTasks.createRecentTaskInfo(task, true);
+        info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+                true /* getTasksAllowed */);
 
         assertTrue(info.supportsMultiWindow);
 
@@ -1242,7 +1257,8 @@
         doReturn(false).when(tda).supportsNonResizableMultiWindow();
         doReturn(false).when(task).isResizeable();
 
-        info = mRecentTasks.createRecentTaskInfo(task, true);
+        info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+                true /* getTasksAllowed */);
 
         assertFalse(info.supportsMultiWindow);
 
@@ -1250,7 +1266,8 @@
         // the device supports it.
         doReturn(true).when(tda).supportsNonResizableMultiWindow();
 
-        info = mRecentTasks.createRecentTaskInfo(task, true);
+        info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+                true /* getTasksAllowed */);
 
         assertTrue(info.supportsMultiWindow);
     }