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

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



Change-Id: Iae8b7758ade0b244d3bf4c5ed55360f297a78c9e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>