Merge "Exit split-screen if one of the splits is empty" into tm-qpr-dev am: e4b7302a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19523989



Change-Id: I5f576ec82c3c357331e496d79803ddb0ac36936d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>