Merge "Clean up the legacy split screen (9/n)" into tm-qpr-dev am: c3565a503d am: 19a614690e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17951290

Change-Id: I17cb0473eae8dd23cfa23f4c4730e5b63d9c4979
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>