title: How to start AccessibilityService?
body: <p>I'm trying to start my implementation of AccessibilityService by using</p>
  
  <pre><code>Intent mailAccessabilityIntent = new Intent(this, EmailAccessabilityService.class);
  startService(mailAccessabilityIntent);
  </code></pre>
  
  <p>My problem is <code>onServiceConnected()</code> never been called.
  How do i start this service properly?</p>