Merge "Update app icon shadows" into tm-dev am: 2b6700a9 am: 5131a1a2

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17937870



Change-Id: I8c0149d616dd4fd7430b07ab127fb50951a08a65
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>