Merge "Make launcher opaque when scrim becomes opaque" into sc-dev am: c2bcdcee9b am: b1b6d8aee9 am: 450a055b1c

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

Change-Id: Ia75a30c77c27af76e0c9d93dc42b6d0cb97f28d0