Merge "Support full preview as home or lock screen" into ub-launcher3-master am: a4627f158c am: 15b65ea6c9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/11751407

Change-Id: Ic565f338f260747d1c93f0ceea236cc1bdc6de95