Merge "Handle animating exit windows with shell transition" into udc-dev am: 203679cd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21493087



Change-Id: Ie55fb1979e58a10033cfd1b5bc2ed7230d69db9f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>