title: Disable vertical scroll in CollapsingToolbarLayout / AppBarLayout
body: <p>I would like the vertical scroll on the CollapsingToolbarLayout / AppBarLayout ONLY when the scroll/touch event occurs in the nestedscrollview (this is working), but if the user tries to scroll the CollapsingToolbarLayout / AppBarLayout directly it should not work. I need this because the scroll/touch events there are messing with my recyclerview scroll events.</p>
  
  <p>I have this structure:</p>
  
  <pre><code>CoordinatorLayout
  
  -- AppBarLayout
  
  ---- CollapsingToolbarLayout (scrollflags: scroll, exitUntilCollapsed, snap)
  
  ------ Toolbar (CollapseMode: pin)
  
  ------ RecyclerView (Horizontal, CollapseMode: pin)
  
  ----- /CollapsingToolbarLayout
  
  -- /AppBarLayout
  
  -- NestedScrollView (Behaviour: appbar_scrolling_view_behavior)
  
  -- /NestedScrollView
  
  / CoordinatorLayout
  </code></pre>
  
  <p>I tried overriding onTouch() and onInterceptTouchEvent() for both CollapsingToolbarLayout / AppBarLayout but it keeps intercepting the touch event/scroll.</p>