Merge "Handle split to pip if open another fullscreen app case" into udc-dev...

Merge "Handle split to pip if open another fullscreen app case" into udc-dev am: dbc02d3f am: 58183d66 am: e0b8e79b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23467957



Change-Id: I505dc980839213173ced1f2876897a85485ae9de
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>