[automerger skipped] Merge "Update split screen UI to support light theme."...

[automerger skipped] Merge "Update split screen UI to support light theme." into tm-qpr-dev am: 767ab1e8 am: 3112d073 -s ours am: 26c5213c -s ours am: 0d31c6e4 -s ours

am skip reason: Merged-In I4a2857c89a04bdacb35c2189b82b8396cbf712ee with SHA-1 a2acce76 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21592580



Change-Id: I43583dbaa7a070e8e6c5b5b47d6543cbba96178c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>