Add Flag to disable wallpaper restorer (1/2) am: cd4f673a am: 30f89efa

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



Change-Id: Ib54a29a1c306e1419170f8b573d73dd54a641a37
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>