title: Is it possible to put a foreground service notification in a notification channel with IMPORTANCE_MIN?
body: <p>I am currently working on transitioning an application to Android O, and I am currently working on notification channels. </p>
  
  <p>I have made different channels with different <a href="https://developer.android.com/preview/features/notification-channels.html#Importance" rel="noreferrer">importance levels</a> and since the application has a foreground service that has to run at all times until we transition to a new architecture (more push oriented), I thought about putting that notification in a channel that has its importance set as <code>IMPORTANCE_MIN</code>, so that it is there, but it doesn't bother the user, and doesn't place an icon in the status bar. </p>
  
  <p>However, when I do that, and I put my application in the background (with Home or Back buttons), I get an Android System notification telling me that my app is running in the background, like so: </p>
  
  <p><a href="https://i.stack.imgur.com/GEjBS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/GEjBS.png" alt="Android System notification for a service running in the background"></a></p>
  
  <p>If I change my channel and make it use <code>IMPORTANCE_LOW</code>, the problem goes away, however, the notification is more prominent.</p>
  
  <p>So, my question is - is it possible to do what I am trying at all? I get that the system would not allow the developers to do this, because if you have a foreground service, it should be visible to the user, but that's just a guess, and I found no documentation regarding this, and that's why I'm posting this question.</p>
  
  <p>My second question is - prior to O, if you set the priority of your notification to <code>PRIORITY_MIN</code>, can you bind that notification to a service to make it a foreground service, or was that a no-go since always?</p>
  
  <p><strong>Edit</strong>: Confirmed that the Android System shows the notification for channels with importance <code>IMPORTANCE_MIN</code> (thanks, M66B), so the question that remains now is why? Does anyone know the reasoning behind this, or can find any documentation anywhere? Is this maybe a bug that should be reported to the tracker?</p>