Merge "Call ConnectivitySettingsUtils to set/get private DNS related settings" am: c12550b9f4 am: 8f8e1512d6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1719017

Change-Id: Ifbe743b2f1eccfb1e553e6521cc0a461a8a475d8