Merge "[Search] Apply background to entire SearchInput view instead of just EditText" into sc-v2-dev am: 7b5aedc72d am: b691132252

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15806806

Change-Id: I3115778ad0131dad542b12137d01314878299096