Merge "Remove elevation from the full widgets picker container" into sc-dev am: 23cf59bfd5 am: 3b93973074 am: e224b0f2c0

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

Change-Id: I2badba0cf395a4634112b9f573a38afd933bc7ba