Merge "Make split screen have enter and exit animation" into tm-qpr-dev am:...

Merge "Make split screen have enter and exit animation" into tm-qpr-dev am: c6bffbb3 am: d75fd2ab

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20490027



Change-Id: Ied4838665296612c49df92f4412ee94d9ca53521
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>