Move the Private DNS dialog back to the top level.

Bug: 64133961
Fixes: 74844869
Test: visual test and interaction
      also updated tests and checked they pass
Change-Id: I7c8d50e5941c2a7dd46014932bdace14dc222c80

src/com/android/settings/network/VpnPreferenceController.java

@@ -180,13 +180,11 @@ public class VpnPreferenceController extends AbstractPreferenceController
             mNetworkCallback = new ConnectivityManager.NetworkCallback() {
         @Override
         public void onAvailable(Network network) {
-            Log.d(TAG, "onAvailable " + network.netId);
             updateSummary();
         }
 
         @Override
         public void onLost(Network network) {
-            Log.d(TAG, "onLost " + network.netId);
             updateSummary();
         }
     };