title: How to determine if a NestedScrollView is scrolled to the end and is idle?
body: <p>Tried that :</p>
  
  <pre><code>NestedScrollView ns =(NestedScrollView) findViewById(R.id.nested_scroll);
          ns.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
              @Override
              public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
  
              }
          });
  </code></pre>
  
  <p>But got stuck, does anyone have an idea?</p>
  
  <p>Just to clearify what i want - i want to be able to observe the scroll state (as in addOnScrollListener of RecyclerView) and check only once, when the scrolling has ended (idle), if the user scrolled to the end of the NestedScrollView.</p>