Merge "Merge "Remove light theme support for split screen surface." into...

Merge "Merge "Remove light theme support for split screen surface." into udc-dev am: 9779b22c am: 5a0fd1b2" into udc-d1-dev-plus-aosp am: 3463210d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22955244



Change-Id: I55fa6b2663e65c531fb40f714541e8350afc7013
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>