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

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



Change-Id: I4a05bf409232c33649d69d6674adc224b8c30ae5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>