Adding API for apps to specify their aspect ratio when entering PIP.

Test: android.server.cts.ActivityManagerPinnedStackTests
Test: #testEnterPipAspectRatio
Test: #testEnterPipExtremeAspectRatios

Change-Id: I9efba942b9a6451dec07428fe1e428ef4a896867
diff --git a/services/core/java/com/android/server/wm/BoundsAnimationController.java b/services/core/java/com/android/server/wm/BoundsAnimationController.java
index 5bfece4..cf5cecda 100644
--- a/services/core/java/com/android/server/wm/BoundsAnimationController.java
+++ b/services/core/java/com/android/server/wm/BoundsAnimationController.java
@@ -96,8 +96,8 @@
     private final class BoundsAnimator extends ValueAnimator
             implements ValueAnimator.AnimatorUpdateListener, ValueAnimator.AnimatorListener {
         private final AnimateBoundsUser mTarget;
-        private final Rect mFrom;
-        private final Rect mTo;
+        private final Rect mFrom = new Rect();
+        private final Rect mTo = new Rect();
         private final Rect mTmpRect = new Rect();
         private final Rect mTmpTaskBounds = new Rect();
         private final boolean mMoveToFullScreen;
@@ -117,8 +117,8 @@
                 boolean moveToFullScreen, boolean replacement) {
             super();
             mTarget = target;
-            mFrom = from;
-            mTo = to;
+            mFrom.set(from);
+            mTo.set(to);
             mMoveToFullScreen = moveToFullScreen;
             mReplacement = replacement;
             addUpdateListener(this);