Allow stacks in split screen to show on lock screen.

The change in ag/3345710 prevented all non full screen stacks from
showing on lock screen. Instead allow split screen and full screen
stack to show on lock screen. Split screen stacks will become full
screen when shown on lock screen.

Fixes: 70919978
Test: Put an app into split screen. Lock screen. Receive a phone call.
      Screen will now properly turn on and show dialer in full screen.

Change-Id: I3759cb4b68a7bdad478b5b603b19140965a24b61
(cherry picked from commit 2c50098c118f3210e3b0bf9beb6731220d3ec3f4)
diff --git a/services/core/java/com/android/server/am/ActivityDisplay.java b/services/core/java/com/android/server/am/ActivityDisplay.java
index af5cf1e..e38148c 100644
--- a/services/core/java/com/android/server/am/ActivityDisplay.java
+++ b/services/core/java/com/android/server/am/ActivityDisplay.java
@@ -556,10 +556,10 @@
         return stack == getTopStack();
     }
 
-    boolean isTopFullscreenStack(ActivityStack stack) {
+    boolean isTopNotPinnedStack(ActivityStack stack) {
         for (int i = mStacks.size() - 1; i >= 0; --i) {
             final ActivityStack current = mStacks.get(i);
-            if (current.getWindowingMode() == WINDOWING_MODE_FULLSCREEN) {
+            if (!current.inPinnedWindowingMode()) {
                 return current == stack;
             }
         }
diff --git a/services/core/java/com/android/server/am/ActivityRecord.java b/services/core/java/com/android/server/am/ActivityRecord.java
index 8eb5197..e1907d3 100644
--- a/services/core/java/com/android/server/am/ActivityRecord.java
+++ b/services/core/java/com/android/server/am/ActivityRecord.java
@@ -2730,12 +2730,14 @@
     }
 
     /**
-     * @return true if the activity contains windows that have
-     *         {@link LayoutParams#FLAG_SHOW_WHEN_LOCKED} set or if the activity has set
-     *         {@link #mShowWhenLocked}.
+     * @return true if the activity windowing mode is not
+     *         {@link android.app.WindowConfiguration#WINDOWING_MODE_PINNED} and activity contains
+     *         windows that have {@link LayoutParams#FLAG_SHOW_WHEN_LOCKED} set or if the activity
+     *         has set {@link #mShowWhenLocked}.
+     *         Multi-windowing mode will be exited if true is returned.
      */
     boolean canShowWhenLocked() {
-        return !inMultiWindowMode() && (mShowWhenLocked
+        return !inPinnedWindowingMode() && (mShowWhenLocked
                 || service.mWindowManager.containsShowWhenLockedWindow(appToken));
     }
 
diff --git a/services/core/java/com/android/server/am/ActivityStack.java b/services/core/java/com/android/server/am/ActivityStack.java
index e9fa20c..831b31e 100644
--- a/services/core/java/com/android/server/am/ActivityStack.java
+++ b/services/core/java/com/android/server/am/ActivityStack.java
@@ -16,7 +16,6 @@
 
 package com.android.server.am;
 
-import static android.app.ITaskStackListener.FORCED_RESIZEABLE_REASON_SECONDARY_DISPLAY;
 import static android.app.ITaskStackListener.FORCED_RESIZEABLE_REASON_SPLIT_SCREEN;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_RECENTS;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
@@ -144,7 +143,6 @@
 import com.android.internal.os.BatteryStatsImpl;
 import com.android.server.Watchdog;
 import com.android.server.am.ActivityManagerService.ItemMatcher;
-import com.android.server.am.EventLogTags;
 import com.android.server.wm.ConfigurationContainer;
 import com.android.server.wm.StackWindowController;
 import com.android.server.wm.StackWindowListener;
@@ -1819,7 +1817,7 @@
             boolean behindFullscreenActivity = !stackShouldBeVisible;
             boolean resumeNextActivity = mStackSupervisor.isFocusedStack(this)
                     && (isInStackLocked(starting) == null);
-            final boolean isTopFullscreenStack = getDisplay().isTopFullscreenStack(this);
+            final boolean isTopNotPinnedStack = getDisplay().isTopNotPinnedStack(this);
             for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
                 final TaskRecord task = mTaskHistory.get(taskNdx);
                 final ArrayList<ActivityRecord> activities = task.mActivities;
@@ -1841,7 +1839,7 @@
 
                     // Now check whether it's really visible depending on Keyguard state.
                     final boolean reallyVisible = checkKeyguardVisibility(r,
-                            visibleIgnoringKeyguard, isTop && isTopFullscreenStack);
+                            visibleIgnoringKeyguard, isTop && isTopNotPinnedStack);
                     if (visibleIgnoringKeyguard) {
                         behindFullscreenActivity = updateBehindFullscreen(!stackShouldBeVisible,
                                 behindFullscreenActivity, r);