title: Showing a Snackbar from inside a Service
body: <p>When showing a <code>SnackBar</code> from inside an <code>Activity</code>, I have the <code>rootView</code> available. But I need to show a <code>SnackBar</code> from inside a <code>Service</code>, where I do not have a <code>View</code> available. How might I accomplish this?</p>
  
  <p>As backstory: an activity starts a service to do a task. The <code>Service</code> needs to show a <code>SnackBar</code> depending on situations. I don’t want to Bind to the <code>Service</code> just for that. So how might I accomplish this? Normally I could show a <code>Toast</code>, but I need the user to be able to read the message and confirm so.</p>