Add Flag to disable wallpaper restorer (1/2) am: cd4f673ab4

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

Change-Id: I1931598be0e9040bc1a1ad23cb23aadfd38f748f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>