Merge "Wallpaper category prefetch should consider force refresh" into sc-dev am: b8a4d92293 am: c367e46810

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/14947730

Change-Id: Ief18091b1b4796e7ee76d1cc6ec23960e0d7617a