title: Camera zoom setting using Camera2 API
body: <p>I'm trying to use the new Camera2 API to access camera setting and apply a zoom.
  In old deprecated Camera API, the code was like follows:</p>
  
  <pre><code>Camera.Parameters parameters = mCamera.getParameters();
  parameters.setZoom(zoomValue);
  mCamera.setParameters(parameters);
  </code></pre>
  
  <p>How can we achieve the same, considering that CameraManager
   is used to open the camera?</p>
  
  <pre><code>CameraManager.openCamera(cameraId, stateCallback, backgroundHandler);
  </code></pre>