Fix blank QS Panel after double tap on profile icon

When handleShowDetailImpl is called twice in quick succession (show
then not show), there is a race condition.  If the second call comes
in before the animation finishes, the second call will call
setGridContentVisibility(true) before the onAnimationEnd callback
calls setGridContentVisibility(false).  At that point the grid
is assumed to be visible when it isn't.

To fix this the HideGridContentWhenDone listener removes itself
as a listener when the animation is cancelled, this will avoid
onAnimationEnd being called in this circumstance, leaving the grid
visible (as it is assumed to be).

Bug: 17424221
Change-Id: I67b84b669ebe0e061e4a2c7f98e8151c221ee4fb

packages/SystemUI/src/com/android/systemui/qs/QSPanel.java

@@ -525,6 +525,12 @@ public class QSPanel extends ViewGroup {
     };
 
     private final AnimatorListenerAdapter mHideGridContentWhenDone = new AnimatorListenerAdapter() {
+        public void onAnimationCancel(Animator animation) {
+            // If we have been cancelled, remove the listener so that onAnimationEnd doesn't get
+            // called, this will avoid accidentally turning off the grid when we don't want to.
+            animation.removeListener(this);
+        };
+
         @Override
         public void onAnimationEnd(Animator animation) {
             setGridContentVisibility(false);