Merge "Add a flag to not disable back gesture in launcher" into tm-qpr-dev am: 1b499bfd

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20525132



Change-Id: Ie099256976e07c6ac8fe51f4c7b8fd2b0d16d782
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>