title: NotificationManager getActiveNotifications() for older devices
body: <p>I want to be able to get active notifications from my Android app on demand. (actually I just need to know if there are any)
  I've been searching for this behavior and it seems, like I have only two options: <code>NotificationManager.getActiveNotifications()</code> which is exactly what I need, but is only available from SDK 23 or using a <code>NotificationService</code> but I really dislike this solution as I have to provide the permission to my app to read all notifications which is definitely an overkill. </p>
  
  <p>Does anybody know about any solution which would behave like <code>NotificationManager.getActiveNotifications()</code> and not require SDK >= 23?</p>
  
  <p>Thanks in advance!</p>