title: affdex frame.getOriginalBitmapFrame() returns null when analyzing camera feed
body: <p>So I am writing some facial landmarking code with the affdex sdk, and I am trying to pass the frame I recieved from the image listener to get certain pixels from its bitmap, and I am getting back <code>null</code> when I try to get this bitmap. Any help to figure out why this is the case would really help! Additionally, I am using the CameraDetector.</p>
  
  <pre><code>@Override
  public void onImageResults(List&lt;Face&gt; faces, Frame frame, float v) {
      if (faces == null|| frame == null)
          return; //frame was not processed
  
      if (faces.size() == 0)
          overlayView.adjustFaces(null, null);
      //final Bitmap b = Bitmap.createBitmap(cameraView.getMeasuredWidth(), cameraView.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
  
      overlayView.adjustFaces(faces, frame);
  
      final Bitmap frameF = frame.getOriginalBitmapFrame();
      final List&lt;Face&gt; facesF = faces;
  
      extractorThread.addToRunnableQueue(new Runnable() {
          @Override
          public void run() {
              float data = regionVal(facesF, frameF);
              System.out.println(data);
              extractorThread.updateBuffer(data);
              extractorThread.computeHR();
          }
      });
  }
  </code></pre>
  
  <p>The <code>frameF</code> bitmap I get is always <code>null</code>, and I dont know why</p>