Merge "Remove elevation from the full widgets picker container" into sc-dev am: 23cf59bfd5 am: 3b93973074

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14793490

Change-Id: I7b4a35a40f54179175226bc9336f7e901f3a536f