Add Flag to disable wallpaper restorer (1/2) am: cd4f673a am: 4a0c6ea8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/23604162



Change-Id: Ia28f581c9dbca4b4f836e6dc55c8fed199c6624e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>