Ensure recycled APN preferences are updated to show radio button

BUG: 17516352
Change-Id: I5da19b7c6d5a3ec03fe24f7bdfda656d6d616342

src/com/android/settings/ApnPreference.java

@@ -71,6 +71,7 @@ public class ApnPreference extends Preference implements
                 mProtectFromCheckedChange = true;
                 rb.setChecked(isChecked);
                 mProtectFromCheckedChange = false;
+                rb.setVisibility(View.VISIBLE);
             } else {
                 rb.setVisibility(View.GONE);
             }