Merge "Calculate crop and colors in the background on ImagePreviewFragment" into sc-dev am: dafbcec1ff am: 01aa3db80a am: e0181ae6fc

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

Change-Id: I3e3ed17bd7c6e2e69cf54d3bcd0b588debc24126