Merge "Use the splash screen background color as the fallback background color" into sc-dev am: 3616f29f83 am: 801dbf90c4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14881306

Change-Id: Ia73716bb16f13045ec8224833497bca37e4f3604