Merge "Only admin users may change private DNS settings" into tm-qpr-dev am: a5a31037cc am: 0369c601c0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/22414528

Change-Id: Ic449ec3db28b2c68933c851d4b3300ad3932b03a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>