Remove the feature flag for using new title.

- remove all code that check for the feature flag, and use the new logic
by default.

Change-Id: I7fbe60da84c1c0f35e7241402a71d2bc4cd300e6
Fixes: 64564191
Test: make RunSettingsRoboTests

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

@@ -59,9 +59,6 @@ public class UnrestrictedDataAccess extends SettingsPreferenceFragment
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
         setAnimationAllowed(true);
-        if (!usePreferenceScreenTitle()) {
-            addPreferencesFromResource(R.xml.unrestricted_data_access_settings);
-        }
         mApplicationsState = ApplicationsState.getInstance(
                 (Application) getContext().getApplicationContext());
         mDataSaverBackend = new DataSaverBackend(getContext());