Merge "Add automirroring to kids mode back button." into tm-qpr-dev am: aaa932d7 am: 6bf7c6b8

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



Change-Id: I9c3f1a94df245e01c841d95829673212cd510f28
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>