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: 26fc7e19

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



Change-Id: Ib5c2bb25a6be58f22fd0ab527536cdb805548880
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>