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

Merge "Exit split-screen if one of the splits is empty" into tm-qpr-dev am: e4b7302a am: b6d79f59

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



Change-Id: I3402f472dc1abd6e588e5d547565e3bedcd22d8e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>