Merge "Set fullscreen mode to task at the end of exit-pip animation" into udc-dev am: 35f2750e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22929277



Change-Id: I8bc39036e0ed96286f7dd46d00b08c60528258fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>