Invalidate the whole status bar after layout transitions.

This should ensure that the menu icon doesn't persist
on-screen even after it's been removed from its parent.
(Related to the KeyButtonView animation glow and the tricks
it plays with invalidation.)

Bug: 5647480
Change-Id: I8ca503ef647aed99335d3dbecedce38fa0b70c65

Author: dsandler

packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java

@@ -514,6 +514,16 @@ protected View makeStatusBarView() {
         // don't wait for these transitions; we just want icons to fade in/out, not move around
         lt.setDuration(LayoutTransition.CHANGE_APPEARING, 0);
         lt.setDuration(LayoutTransition.CHANGE_DISAPPEARING, 0);
+        lt.addTransitionListener(new LayoutTransition.TransitionListener() {
+            public void endTransition(LayoutTransition transition, ViewGroup container,
+                    View view, int transitionType) {
+                // ensure the menu button doesn't stick around on the status bar after it's been
+                // removed
+                mBarContents.invalidate();
+            }
+            public void startTransition(LayoutTransition transition, ViewGroup container,
+                    View view, int transitionType) {}
+        });
         mNavigationArea.setLayoutTransition(lt);
         // no multi-touch on the nav buttons
         mNavigationArea.setMotionEventSplittingEnabled(false);