title: Android Push Notification when app in background or closed
body: <p>My app has push notification (FCM). When app runs in foreground,I can get data payload in onMessageReceived() function. When app runs in background or app was fully closed, onMessageReceived() function was not invoked. 
  My question is, is possible to get data payload when app in background or closed?</p>
  
  <p>Thanks in advance!</p>