Merge "Fixing nullPointer exception when wallpaper colors is null" into sc-dev am: ada0acd75c am: 05d63cef48

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14391145

Change-Id: I3c9f37030330a629aff0d3ea06a386e8cf6d2e59