Merge "Make launcher opaque when scrim becomes opaque" into sc-dev am: c2bcdcee9b am: 401d94b0bc am: 04dc96e001

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

Change-Id: I7b3b78631ad0da98bd58d0ab3a8adc6f64283137