Merge "Avoids animating the background when launching app targets are translucent." into sc-v2-dev am: 2eb7511781

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15910515

Change-Id: Ifba94b72bd0dfe9f57a230f1bdcae7d45f26c526