Merge "Null mRecentsAnimationController in the end" into sc-dev am: 5241e3ebc0 am: 5d39d69d27

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14288953

Change-Id: Ia610215f179436827d47d88c7564ff655d19f807