Merge "Change unfold background color based on split screen state" into...

Merge "Change unfold background color based on split screen state" into udc-dev am: 550f35fc am: 0cb35c55 am: b3ee24c1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23083218



Change-Id: I29140fe8d74924c5f9dc5e0369723b6478022195
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>