title: Android: Check whether camera supports auto-focus?
body: <p>For the Android API version 2.1 and higher, we can use context:</p>
  
  <pre><code>getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_AUTOFOCUS)
  </code></pre>
  
  <p>But before version 2.1, how can we perform the same operation? Is there anything like this that does not involve invoking <code>Camera.open</code> and then <code>getParameters</code>?</p>