Merge "Calculate crop and colors in the background on ImagePreviewFragment" into sc-dev am: dafbcec1ff am: 0e4048aba5 am: bdec2b19a3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/15152514

Change-Id: I8cd39738bd5c6b619a607f49c6e3eda9c1c6e15b