Allow PipTouchHandler to re-enable the touches

This is to fix the regression from ag/21471704 that
PipTouchHandler#setTouchEnabled(true) is not called due to
PipAnimationController#quietCancel when receives display changed
callback, which happens on folding the display.

Bug: 272825196
Test: manual, follow the reproduces in b/272825196
Test: manual, make sure no regression following b/263211281
Change-Id: I3f18680856bd3705af8ca374bf1592ae97499071

libs/WindowManager/Shell/src/com/android/wm/shell/pip/PipAnimationController.java

@@ -210,7 +210,7 @@ public class PipAnimationController {
     /**
      * Quietly cancel the animator by removing the listeners first.
      */
-    public static void quietCancel(@NonNull ValueAnimator animator) {
+    static void quietCancel(@NonNull ValueAnimator animator) {
         animator.removeAllUpdateListeners();
         animator.removeAllListeners();
         animator.cancel();

libs/WindowManager/Shell/src/com/android/wm/shell/pip/PipTaskOrganizer.java

@@ -147,10 +147,12 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
     // These callbacks are called on the update thread
     private final PipAnimationController.PipAnimationCallback mPipAnimationCallback =
             new PipAnimationController.PipAnimationCallback() {
+        private boolean mIsCancelled;
         @Override
         public void onPipAnimationStart(TaskInfo taskInfo,
                 PipAnimationController.PipTransitionAnimator animator) {
             final int direction = animator.getTransitionDirection();
+            mIsCancelled = false;
             sendOnPipTransitionStarted(direction);
         }
 
@@ -158,6 +160,10 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
         public void onPipAnimationEnd(TaskInfo taskInfo, SurfaceControl.Transaction tx,
                 PipAnimationController.PipTransitionAnimator animator) {
             final int direction = animator.getTransitionDirection();
+            if (mIsCancelled) {
+                sendOnPipTransitionFinished(direction);
+                return;
+            }
             final int animationType = animator.getAnimationType();
             final Rect destinationBounds = animator.getDestinationBounds();
             if (isInPipDirection(direction) && animator.getContentOverlayLeash() != null) {
@@ -196,6 +202,7 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
         public void onPipAnimationCancel(TaskInfo taskInfo,
                 PipAnimationController.PipTransitionAnimator animator) {
             final int direction = animator.getTransitionDirection();
+            mIsCancelled = true;
             if (isInPipDirection(direction) && animator.getContentOverlayLeash() != null) {
                 fadeOutAndRemoveOverlay(animator.getContentOverlayLeash(),
                         animator::clearContentOverlay, true /* withStartDelay */);

libs/WindowManager/Shell/src/com/android/wm/shell/pip/phone/PipController.java

@@ -779,7 +779,7 @@ public class PipController implements PipTransitionController.PipTransitionCallb
                     mPipAnimationController.getCurrentAnimator();
             if (animator != null && animator.isRunning()) {
                 // cancel any running animator, as it is using stale display layout information
-                PipAnimationController.quietCancel(animator);
+                animator.cancel();
             }
             onDisplayChangedUncheck(layout, saveRestoreSnapFraction);
         }