Properly index developer options.

Change-Id: Id9ab629438f52c65fd774341b1200dacb4efd93b
Fix: 37724514
Test: make RunSettingsRoboTests

src/com/android/settings/ApnSettings.java

@@ -184,7 +184,7 @@ public class ApnSettings extends RestrictedSettingsFragment implements
         mUnavailable = isUiRestricted();
         setHasOptionsMenu(!mUnavailable);
         if (mUnavailable) {
-            addPreferencesFromResource(R.xml.empty_settings);
+            addPreferencesFromResource(R.xml.placeholder_prefs);
             return;
         }