Send KEYCODE_HOME for home button instead of startActivity directly

Also updated calls to onBackEvent to match new signature of
including displayId.

Bug: 381339822
Flag: com.android.launcher3.home_button_uses_keycode_home
Test: manual, also OverviewCommandHelperTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9ba5fcaffa95621af543be20851806f7dec88183)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:063dd3bcdd0dcbff5be4f53a6f39c4070f76706b)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:4758973488ef3f85483a52f08d0bfc87954ad2e7)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:5bac97af31ef8ae48e5c49effcf7231d02a234d0)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:979a35df7aa7e9cb153409abc3b96861b2581ca1)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b91ab66683ae04842c8c8eac6ec61a407416826c)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:c652ca9ea210336af22cf8191f723ba1a0f352b0)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:5625c5b8a621b7daf5945764905402ff121b8429)
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:2f9f1570f46547ba07a8b28bdaa2f1b482441912
Merged-In: I6e1272e1526e8b136376852f8ff50e3fa68bbede
Change-Id: I6e1272e1526e8b136376852f8ff50e3fa68bbede

quickstep/src/com/android/quickstep/OverviewCommandHelper.java

diff --git a/quickstep/src/com/android/quickstep/OverviewCommandHelper.java b/quickstep/src/com/android/quickstep/OverviewCommandHelper.java
index dffdc5a..ea9d16b 100644
--- a/quickstep/src/com/android/quickstep/OverviewCommandHelper.java
+++ b/quickstep/src/com/android/quickstep/OverviewCommandHelper.java
@@ -24,6 +24,7 @@
 import android.os.Build;
 import android.os.SystemClock;
 import android.os.Trace;
+import android.view.KeyEvent;
 
 import androidx.annotation.BinderThread;
 import androidx.annotation.Nullable;
@@ -64,14 +65,17 @@
     private final TouchInteractionService mService;
     private final OverviewComponentObserver mOverviewComponentObserver;
     private final TaskAnimationManager mTaskAnimationManager;
+    private final SystemUiProxy mSystemUiProxy;
     private final ArrayList<CommandInfo> mPendingCommands = new ArrayList<>();
 
     public OverviewCommandHelper(TouchInteractionService service,
             OverviewComponentObserver observer,
-            TaskAnimationManager taskAnimationManager) {
+            TaskAnimationManager taskAnimationManager,
+            SystemUiProxy systemUiProxy) {
         mService = service;
         mOverviewComponentObserver = observer;
         mTaskAnimationManager = taskAnimationManager;
+        mSystemUiProxy = systemUiProxy;
     }
 
     /**
@@ -170,7 +174,7 @@
                 return true;
             }
             if (cmd.type == TYPE_HOME) {
-                mService.startActivity(mOverviewComponentObserver.getHomeIntent());
+                mSystemUiProxy.onKeyEvent(KeyEvent.KEYCODE_HOME);
                 return true;
             }
         } else {

quickstep/src/com/android/quickstep/SystemUiProxy.java

diff --git a/quickstep/src/com/android/quickstep/SystemUiProxy.java b/quickstep/src/com/android/quickstep/SystemUiProxy.java
index 39d8b54..686c932 100644
--- a/quickstep/src/com/android/quickstep/SystemUiProxy.java
+++ b/quickstep/src/com/android/quickstep/SystemUiProxy.java
@@ -136,6 +136,17 @@
     }
 
     @Override
+    public void onKeyEvent(int keycode) {
+        if (mSystemUiProxy != null) {
+            try {
+                mSystemUiProxy.onKeyEvent(keycode);
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed call onKeyEvent", e);
+            }
+        }
+    }
+
+    @Override
     public void onImeSwitcherPressed() {
         if (mSystemUiProxy != null) {
             try {

quickstep/src/com/android/quickstep/TouchInteractionService.java

diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index 61d36fb..4d7f839 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -438,7 +438,8 @@
         mTaskAnimationManager = new TaskAnimationManager(this);
         mOverviewComponentObserver = new OverviewComponentObserver(this, mDeviceState);
         mOverviewCommandHelper = new OverviewCommandHelper(this,
-                mOverviewComponentObserver, mTaskAnimationManager);
+                mOverviewComponentObserver, mTaskAnimationManager,
+                SystemUiProxy.INSTANCE.get(this));
         mResetGestureInputConsumer = new ResetGestureInputConsumer(mTaskAnimationManager);
         mInputConsumer = InputConsumerController.getRecentsAnimationInputConsumer();
         mInputConsumer.registerInputConsumer();