Merge "Display in-memory icon for app close while AdaptiveIcon loads." into sc-v2-dev am: b788f9f7f7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16441110

Change-Id: I21e8ad9e5df8dacba63601911f08782d8c935b0d