Set ActivityView's rect as tap exclude region

Track bounds of an ActivityView and set them as a tap exclude region,
so that taps on this area won't cause a focus switch between
hosting activity and activities inside of ActivityView.

Bug: 63902362
Test: Manual with ActivityView test app
Change-Id: I3cdafe32e0bdf414507fef0d622d9c140eee3188
diff --git a/services/core/java/com/android/server/wm/DisplayContent.java b/services/core/java/com/android/server/wm/DisplayContent.java
index a8e00dd..531409f 100644
--- a/services/core/java/com/android/server/wm/DisplayContent.java
+++ b/services/core/java/com/android/server/wm/DisplayContent.java
@@ -134,6 +134,7 @@
 import android.os.RemoteException;
 import android.os.SystemClock;
 import android.os.Trace;
+import android.util.ArraySet;
 import android.util.DisplayMetrics;
 import android.util.MutableBoolean;
 import android.util.Slog;
@@ -330,6 +331,8 @@
     final PinnedStackController mPinnedStackControllerLocked;
 
     final ArrayList<WindowState> mTapExcludedWindows = new ArrayList<>();
+    /** A collection of windows that provide tap exclude regions inside of them. */
+    final ArraySet<WindowState> mTapExcludeProvidingWindows = new ArraySet<>();
 
     private boolean mHaveBootMsg = false;
     private boolean mHaveApp = false;
@@ -1866,10 +1869,14 @@
             }
         }
         for (int i = mTapExcludedWindows.size() - 1; i >= 0; i--) {
-            WindowState win = mTapExcludedWindows.get(i);
+            final WindowState win = mTapExcludedWindows.get(i);
             win.getTouchableRegion(mTmpRegion);
             mTouchExcludeRegion.op(mTmpRegion, Region.Op.UNION);
         }
+        for (int i = mTapExcludeProvidingWindows.size() - 1; i >= 0; i--) {
+            final WindowState win = mTapExcludeProvidingWindows.valueAt(i);
+            win.amendTapExcludeRegion(mTouchExcludeRegion);
+        }
         // TODO(multi-display): Support docked stacks on secondary displays.
         if (mDisplayId == DEFAULT_DISPLAY && getSplitScreenPrimaryStack() != null) {
             mDividerControllerLocked.getTouchRegion(mTmpRect);