Wallpaper picker reset support (2/3). am: c27b1d38

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/20806778



Change-Id: I967b84641e931ca0a150cab6e12430cd6b8ca805
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>