Merge "Adding support for listening for app launch animation completion" into sc-dev am: da2ecb3095

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13803788

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I30e73839aae3aedb811913b25b98e1a09be965df