Merge "Handle split to pip if open another fullscreen app case" into udc-dev am: dbc02d3f am: 4f71a727

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



Change-Id: I8f897df5a9a4ecd890014353d7dafc007a625d06
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>