title: "Auto-Focus" feature for the "Camera" module of my Android application
body: <p>I have been working with the CAMERA module for my application since few days.
  I have customized the complete camera module instead of invoking the hardware inbuilt mobile camera through an intent. I have used the call backs for shutter, picture etc
   Now I am trying to add the ZOOM and AUTO-FOCUS features to this customized camera. Can anybody please let me know the way to add the ZOOM and AUTO-FOCUS features along with the required permissions which should be mentioned in the manifest file..hope i will be helped as soon as possible.</p>