Merge "Add OWNERS for ThemePicker" into udc-qpr-dev am: 4bfa157dd7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/24530091

Change-Id: Id8133da3c56c41c8f038feb7962077b47145e95f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>