Merge "Add Developer Options string to xml." into tm-dev am: 566c676d am: dd1438a2

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17826466



Change-Id: Ib582e5485e738346b88eed0657ad08780e93d513
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>