title: Is there any way make Snackbar persist among activity changes?
body: <p>Although <code>Snackbar</code> is beautiful, it doesn't persist when changing activities. This is a bummer in scenarios where I would like to confirm that a message was sent using a <code>Snackbar</code>, before finishing the activity. I've considered pausing the code before exiting the activity, but have found that to be a bad practice. </p>
  
  <p>If what I describe isn't possible, is there any type of material design toast message? Or a way to make a rectangular toast message; one with rounded edges of a smaller radius?</p>