title: Android Add <uses-feature> in Manifest
body: <p>I am pretty confused where to add the</p>
  
  <blockquote>
    <p>uses-feature</p>
  </blockquote>
  
  <p>tag in the manifest.
  I am using the camera in my app. I added permission but I'm confused where to add features in order to use front facing camera.  Can you help?</p>