title: How to know if a RecyclerView has enough content to scroll?
body: <p>Currently I am using a RecyclerView with a LinearLayout Manager and an EditText as HeaderView for filtering the content of the list.</p>
  
  <p>I would like to hide the EditText if the content of the RecyclerView is smaller than the RecyclerView itself. </p>
  
  <p>Is there any way to "ask" the Recyclerview or the LayoutManager if its content can scroll?</p>
  
  <p>Thank you all.</p>