Merge "Avoids animating the background when launching app targets are translucent." into sc-v2-dev am: 2eb7511781 am: 508814d8f3

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

Change-Id: I94e130af99a41f856399f14f0a761bba1599f433