Remove the deprecated class DataUsageBase.

- and update all its subclass to extend DataUsageBaseFragment instead.

Bug: 111751694
Test: make RunSettingsRoboTests
Change-Id: Ic5720af43082d8b39642b6a539515f3f20d32694

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

@@ -52,7 +52,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 @SearchIndexable
-public class BillingCycleSettings extends DataUsageBase implements
+public class BillingCycleSettings extends DataUsageBaseFragment implements
         Preference.OnPreferenceChangeListener, DataUsageEditController {
 
     private static final String TAG = "BillingCycleSettings";
@@ -105,7 +105,6 @@ public class BillingCycleSettings extends DataUsageBase implements
         Bundle args = getArguments();
         mNetworkTemplate = args.getParcelable(DataUsageList.EXTRA_NETWORK_TEMPLATE);
 
-        addPreferencesFromResource(R.xml.billing_cycle);
         mBillingCycle = findPreference(KEY_BILLING_CYCLE);
         mEnableDataWarning = (SwitchPreference) findPreference(KEY_SET_DATA_WARNING);
         mEnableDataWarning.setOnPreferenceChangeListener(this);
@@ -191,6 +190,16 @@ public class BillingCycleSettings extends DataUsageBase implements
         return MetricsEvent.BILLING_CYCLE;
     }
 
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.billing_cycle;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
     @VisibleForTesting
     void setPolicyLimitBytes(long limitBytes) {
         if (LOGD) Log.d(TAG, "setPolicyLimitBytes()");