If we're adding / removing a bubble, don't forget to add the overflow

One case I missed was a bubble being added/removed AND the overflow
showing... this isn't the nicest, but when the add/remove animation
is done, animate the overflow in.

Flag: com.android.wm.shell.enable_bubble_bar
Fixes: 358304168
Test: manual - don't have the overflow showing, add a 6th bubble,
               observe that the overflow appears
Change-Id: I1a9cec3970f5535e935f3404fa6dbd6de2f69fa5

quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarController.java

@@ -286,9 +286,10 @@ public class BubbleBarController extends IBubblesListener.Stub {
             RemovedBubble removedBubble = update.removedBubbles.get(0);
             BubbleBarBubble bubbleToRemove = mBubbles.remove(removedBubble.getKey());
             mBubbles.put(update.addedBubble.getKey(), update.addedBubble);
+            boolean showOverflow = update.showOverflowChanged && update.showOverflow;
             if (bubbleToRemove != null) {
                 mBubbleBarViewController.addBubbleAndRemoveBubble(update.addedBubble,
-                        bubbleToRemove, isExpanding, suppressAnimation);
+                        bubbleToRemove, isExpanding, suppressAnimation, showOverflow);
             } else {
                 mBubbleBarViewController.addBubble(update.addedBubble, isExpanding,
                         suppressAnimation);