Have AlphaUpdateListener update visibility in onAnimationEnd() am: 26ab4621ce am: 96cb92075e am: 7f134ecb33

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14882859

Change-Id: I26f96f4addb9b7bad75dd46f01fbd09f9d267dc9