Quick affordance picker in ThemePicker. am: 573aae856c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/20621712

Change-Id: I0b843290b89b20b911d99e3f40348f5efc15019a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>