[Provider Model] Add Airplane-safe Networks preference

- Hide the preference when airplane mode is off.

- Reuse PrimarySwitchPreference for RestrictedSwitchPreference

- Screenshot
  https://screenshot.googleplex.com/8HiC5sc8xaqnhz5

Bug: 174022082
Test: atest -c AirplaneSafeNetworksPreferenceControllerTest
Change-Id: I06a56e8e815778cebf200c4a486c414e92f4cb87

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

@@ -147,6 +147,7 @@ public class NetworkDashboardFragment extends DashboardFragment implements
         controllers.add(privateDnsPreferenceController);
         if (Utils.isProviderModelEnabled(context)) {
             controllers.add(new NetworkProviderCallsSmsController(context, lifecycle));
+            controllers.add(new AirplaneSafeNetworksPreferenceController(context, lifecycle));
         }
         return controllers;
     }