title: Android Camera2 API manual exposure change
body: <p>According to offical google team statement the CONTROL_AE_EXPOSURE_COMPENSATION manual change is broken on Android 5.1. I'm lookin for a workaround for couple of days and the only one I found is connected to SENSOR_INFO_SENSITIVITY_RANGE. However, I found some difficulties in using it. My code look like this:</p>
  
  <pre><code>if(!modeDisabled){
                      mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_OFF);
                      modeDisabled=true;
                  }
                  range1 = characteristics.get(CameraCharacteristics.SENSOR_INFO_SENSITIVITY_RANGE);
                  minmin = range1.getLower();
                  maxmax = range1.getUpper();
                  int iso = ((i * (maxmax - minmin)) / 100 + minmin);
                  mPreviewRequestBuilder.set(CaptureRequest.SENSOR_SENSITIVITY, iso);
  
  
  mCaptureSession.setRepeatingRequest(mPreviewRequestBuilder.build(), null, mBackgroundHandler);
  </code></pre>
  
  <p>Of course the 'i' value is a progress value taken from the seekbar and everyting is closed in OnProgressChanged function. </p>
  
  <p>The problem is that there are no visible changes when manipulating the seekbar. I'd be really gratetful for any help.</p>