Merge "Add back screenshot button to Launcher3" into sc-v2-dev am: 5656154f1a am: abda7bc69c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16365185

Change-Id: I61b276bc55eb8486828e5ee9c19251065564d56e