title: How to show BottomSheetDialogFragment with left/right/bottom margin?
body: <p><code>BottomSheetDialogFragment</code> is shown with full screen width and there is no bottom margin. I want to set the left/right and bottom margin.</p>
  
  <p>I know we can use <code>BottomSheetBehaviour</code> and apply it to a <code>View</code> object in our layout. But I want to use <code>BottomSheetDialogFragment</code></p>