Merge "Retain full opacity during task dismissal unless in bottom grid row." into sc-v2-dev am: 5319444c49 am: 05174b383d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15794177

Change-Id: Iacba7e8c592665b1efbbec1f533e8c0aa8063011