Merge "Add automirroring to kids mode back button." into tm-qpr-dev am: aaa932d78c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/22099529

Change-Id: Ibb3b22420e54291613edba5806446dbe0284b5ba
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>