Merge "[tp] Changes GlobalScope to CoroutineScope(Dispatchers.Main) (2/2)." into udc-dev am: c78b9ad38a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/22894548

Change-Id: If9b0e92f0e3505f9d8892af9d1a406cf1d95751b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>