5G meteredness for telephony framework

Add listener for SubscriptionPlans changed

Bug: 151630253
Test: atest FrameworksTelephonyTests
Change-Id: I0c8e84f74fd1f69ffc7e1046819966fcb04732a6
Merged-In: I0c8e84f74fd1f69ffc7e1046819966fcb04732a6

src/com/android/settings/datausage/DataSaverBackend.java

@@ -23,6 +23,7 @@ import android.content.Context;
 import android.net.INetworkPolicyListener;
 import android.net.NetworkPolicyManager;
 import android.os.RemoteException;
+import android.telephony.SubscriptionPlan;
 import android.util.SparseIntArray;
 
 import com.android.settings.overlay.FeatureFactory;
@@ -201,6 +202,10 @@ public class DataSaverBackend {
         @Override
         public void onSubscriptionOverride(int subId, int overrideMask, int overrideValue) {
         }
+
+        @Override
+        public void onSubscriptionPlansChanged(int subId, SubscriptionPlan[] plans) {
+        }
     };
 
     public interface Listener {