Java Question onCreate not called in library ActivityObject

public class ABWearOS extends FragmentActivity implements AmbientModeSupport.AmbientCallbackProvider, DataClient.OnDataChangedListener, MessageClient.OnMessageReceivedListener, CapabilityClient.OnCapabilityChangedListener {
   private static String _eventName;
   private static BA _ba;
   
    private boolean mShowDebug=false;
   
    private AmbientModeSupport.AmbientController mAmbientController;
   
    private boolean mIsLowBitAmbient=false;
    private boolean mDoBurnInProtection=false;
   
    @Hide
    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       
       BA.Log("onCreate()");  // <-------------- never called
     
       mAmbientController = AmbientModeSupport.attach(this);       
    }