title: react native AppState has no 'inactive' state on Android
body: <p>I am trying to change the UI just before the user leaves the app (user is in multi-tasking view or switches to some other app). To be more specific when user leaves the app I want to add a fullscreen view with the app logo.</p>
  
  <p>I am using AppState for that.</p>
  
  <p>On iOS it works as expected: in multitasking view app gets inactive state and once switched to other app state goes to background. When state is inactive I can still change UI.</p>
  
  <p>However, on Android the state is either active or background. 
  Problem is that in background state I cannot change the UI anymore.</p>
  
  <p>Is this a bug on Android? If not, what are my options to get it working on Android.</p>
  
  <p>Thanks. </p>