title: Firebase cloud messaging service not running on Oreo
body: <p>I am working on a chat app for which i am using Firebase cloud messaging.
  Everything works fine till android nougat , But as i have explored Android Oreo doesn't support background services . That's why my firebase push notification service is not running when app is stopped .</p>
  
  <pre><code>onMessageReceived() is not called in background
  </code></pre>
  
  <p>Please help me with this how can i receive message even when my app is closed on Oreo.</p>
  
  <p>Thanks.</p>