Merge "Avoid double end on PipTransitionAnimator" into udc-dev am: 839aca67...

Merge "Avoid double end on PipTransitionAnimator" into udc-dev am: 839aca67 am: 2a93920d am: 27f4ecaa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23270226



Change-Id: Ied7f584dcabd96a943f45f6a639e7c98acf3afc9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>