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: I594ecde54c05b54491250ce34d29099219da02c8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>