Merge "Add CONTAINER_WALLPAPERS for storing wallpaper info." into sc-v2-dev am: a682cda639 am: b5aa6aa28b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15749700

Change-Id: Ifbbf361ec562b0bda186687417d7e1aab6e370af