Merge "Make launcher opaque when scrim becomes opaque" into sc-dev am: c2bcdcee9b am: 401d94b0bc

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14654426

Change-Id: I40b13b031053ae25ca6cae7d88de3a843da57553