Do not allow home screen only wallpaper if current is the default am: 7742666ea7 am: cd23f3d5f0 am: d7b612fbb9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/15567276

Change-Id: Id42c14b80c0f1130a0b3729e5e90b9e08133069f