title: Show settings under accounts & sync menu for android app
body: <p>I am implementing a syncadapter for an android app and would like to make the settings for the account available under the "Accounts &amp; sync" menu.  I have seen this done in the DropBox app(as shown below), but I have not been able to find documentation on how to do this.  I have the accounted added, just want to add a link to the account settings in this menu.</p>
  
  <p><img src="https://i.stack.imgur.com/rSKdo.png" alt="enter image description here"></p>