Merge "Using an independent drawable for rounded corners" into sc-dev am: 70c3d5f98b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14015805

Change-Id: Ia39aeb9b6b1c82b0a3e2c0cc10b2e73562a8096f