title: BottomSheetDialogFragment fix the position of actions
body: <p>Is it possible to lock the button at the bottom of the BottomSheetDialogFragment when scrolling?</p>
  
  <p><a href="https://i.stack.imgur.com/96A8n.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/96A8n.png" alt="enter image description here"></a><a href="https://i.stack.imgur.com/PrHdD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PrHdD.png" alt="enter image description here"></a></p>