Merge "Fix crash from previewing launcher with unknown wallpaper colors." into...

Merge "Fix crash from previewing launcher with unknown wallpaper colors." into sc-dev am: 200d7634

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15462873

Change-Id: Ied267f8cd7e6176a2f7ce00b9f1b92293deafdac