Ignore resize request when exiting PiP

When PipTaskOrganizer#removePip is called, the animator in
PipMotionHelper may still be running and issues a conflict window
container transaction at its end. This causes the activity resuming to a
weird bounds after drag to dismiss and re-open, in split-screen mode.

Fixes this by
- In PipMotionHelper, if it's a dismiss action, do not issue the window
container transaction
- In PipTaskOrganizer, if we know we're exiting, do not accept any
resize request

Video: http://rcll/aaaaaabFQoRHlzixHdtY/fCOxvnTXu9RtFYERIdskNf
Bug: 159943928
Test: see video
Change-Id: Ia9dd02f9707f9da74166bee24a015c2bb4e223c2

packages/SystemUI/src/com/android/systemui/pip/PipTaskOrganizer.java

@@ -612,7 +612,9 @@ public class PipTaskOrganizer extends TaskOrganizer implements
             @PipAnimationController.TransitionDirection int direction, int durationMs,
             Consumer<Rect> updateBoundsCallback) {
         if (!mInPip) {
-            // can be initiated in other component, ignore if we are no longer in PIP
+            // TODO: tend to use shouldBlockResizeRequest here as well but need to consider
+            // the fact that when in exitPip, scheduleAnimateResizePip is executed in the window
+            // container transaction callback and we want to set the mExitingPip immediately.
             return;
         }
 
@@ -668,8 +670,7 @@ public class PipTaskOrganizer extends TaskOrganizer implements
     private void scheduleFinishResizePip(Rect destinationBounds,
             @PipAnimationController.TransitionDirection int direction,
             Consumer<Rect> updateBoundsCallback) {
-        if (!mInPip) {
-            // can be initiated in other component, ignore if we are no longer in PIP
+        if (shouldBlockResizeRequest()) {
             return;
         }
 
@@ -697,8 +698,7 @@ public class PipTaskOrganizer extends TaskOrganizer implements
      */
     public void scheduleOffsetPip(Rect originalBounds, int offset, int duration,
             Consumer<Rect> updateBoundsCallback) {
-        if (!mInPip) {
-            // can be initiated in other component, ignore if we are no longer in PIP
+        if (shouldBlockResizeRequest()) {
             return;
         }
         if (mShouldDeferEnteringPip) {
@@ -869,6 +869,16 @@ public class PipTaskOrganizer extends TaskOrganizer implements
                 : params.getAspectRatio();
     }
 
+    /**
+     * Resize request can be initiated in other component, ignore if we are no longer in PIP
+     * or we're exiting from it.
+     *
+     * @return {@code true} if the resize request should be blocked/ignored.
+     */
+    private boolean shouldBlockResizeRequest() {
+        return !mInPip || mExitingPip;
+    }
+
     /**
      * Sync with {@link #mSplitDivider} on destination bounds if PiP is going to split screen.
      *

packages/SystemUI/src/com/android/systemui/pip/phone/PipMotionHelper.java

@@ -533,8 +533,11 @@ public class PipMotionHelper implements PipAppOpsListener.Callback,
                 && !mSpringingToTouch
                 && !mMagnetizedPip.getObjectStuckToTarget()) {
             mBounds.set(mTemporaryBounds);
-            mPipTaskOrganizer.scheduleFinishResizePip(mBounds);
-
+            if (!mDismissalPending) {
+                // do not schedule resize if PiP is dismissing, which may cause app re-open to
+                // mBounds instead of it's normal bounds.
+                mPipTaskOrganizer.scheduleFinishResizePip(mBounds);
+            }
             mTemporaryBounds.setEmpty();
         }