Merge "Fully null check mRecentsAnimationController" into sc-dev am: d61f224570 am: 597943985f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15147296

Change-Id: Ic9a36bc25a01d9ef5832918c9898a362fa1bf6c5