Merge "Switch to main thread when execute update colors" into udc-qpr-dev am: 49ec7f6c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23817657



Change-Id: I9019617247cdd9f4af9c42ebf3ba605ef9187694
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>