Merge "Make PIP into split screen" into tm-qpr-dev am: 5c978d3f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20766589



Change-Id: I7bf4d8adbe69e5bbd72289d2fc8420f6717fcd0b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>