Merge "Release the child layer on TaskSnapshot" into sc-v2-dev am: 10b3662274 am: 162a7eb248

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15556988

Change-Id: Ie6651ad9b72b2597c45f9c42a686d6c35df5aec5

libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/TaskSnapshotWindow.java

@@ -364,6 +364,7 @@ public class TaskSnapshotWindow {
 
         // In case window manager leaks us, make sure we don't retain the snapshot.
         mSnapshot = null;
+        mSurfaceControl.release();
     }
 
     private void drawSizeMatchSnapshot() {
@@ -431,6 +432,7 @@ public class TaskSnapshotWindow {
             mTransaction.setBuffer(mSurfaceControl, background);
         }
         mTransaction.apply();
+        childSurfaceControl.release();
     }
 
     /**