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: 97f4fa09 am: 13367101 am: 307114d3

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



Change-Id: I513ad42e2f299b40859ce8705d5cd7da027f2492
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>