Make reloading color options thread safe am: 4c74f6f9 am: ec507dfd

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/18030545



Change-Id: I7b2dc7b88e8d18f4463ea7c641b5dc061e027dcb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>