Merge "Remove elevation from the full widgets picker container" into sc-dev am: 23cf59bfd5 am: e14cb20a6c am: 76416f5065

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

Change-Id: I48df0cef4fd899a7989aa76ad57958a1f47a8d3a