Merge "[Live preview 2/3] Add Slices support to Live preview" into ub-launcher3-master am: d9335505ea am: 23b6e74f6e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/11367463

Change-Id: I09d76fd50f057b10f6ecfb4c93c0e929cc58fe7d