Fix bug #12979102 Menu (Reset to default) and Add icon missing in APNs

- revert the changes on the ApnSettings to be again an Activity...

Change-Id: I7a12e25456f0a0df0f7618183f49fd8db10a5441

src/com/android/settings/SettingsActivity.java

@@ -277,8 +277,7 @@ public class SettingsActivity extends Activity
             PaymentSettings.class.getName(),
             KeyboardLayoutPickerFragment.class.getName(),
             ChooseAccountFragment.class.getName(),
-            DashboardSummary.class.getName(),
-            ApnSettings.class.getName()
+            DashboardSummary.class.getName()
     };
 
     private SharedPreferences mDevelopmentPreferences;