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

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

Change-Id: I7f8170a41bbafff925f00ae0f0168d9603419c6b