title: Firebase facebook button android authentication when logged out
body: <p>I'm using firebase in my android app and facebook SDK for logging-in as well.
  The only problem I'm facing is that when I log-in with facebook, then log-out, the facebook login button is in the "log-out" state and when I click it, it asks if I want to log-out.</p>
  
  <p>like shown</p>
  
  <p><a href="http://i.stack.imgur.com/tALV7.png" rel="noreferrer">Problem ScreenShot</a></p>
  
  <p>What I do to log-out:</p>
  
  <pre><code>FirebaseAuth.getInstance().signOut()
  </code></pre>
  
  <p>so, this obviously only clears my session on firebase but doesn't disconnect my app with facebook, what to do?</p>