Merge "[tp] Changes GlobalScope to CoroutineScope(Dispatchers.Main) (2/2)." into udc-dev am: c78b9ad38a am: a349e08e3a am: bbf5c94103

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

Change-Id: I011298b7eaacc484e5a1a6cb8dbe17a7773817ee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>