title: CollapsingToolbar not working with not-so-tall content
body: <p>I'm pretty sure this is a bug, so I'm asking for a workaround. My layout is like:</p>
  
  <pre><code>&lt;CoordinatorLayout&gt;
  
      &lt;AppBarLayout&gt;
          &lt;CollapsingToolbarLayout&gt;
              &lt;ImageView/&gt;
              &lt;Toolbar/&gt;
          &lt;/CollapsingToolbarLayout&gt;
      &lt;/AppBarLayout&gt;
  
      &lt;android.support.v4.widget.NestedScrollView/&gt; &lt;!-- content here --&gt;
  
  &lt;/CoordinatorLayout&gt;
  </code></pre>
  
  <p>I'm retrieving content from the web, and I don't know how tall it'll be - might be few lines, might be very long.
  However, I discovered that <code>CollapsingToolbar</code> doesn't work well when content is not big enough to cover the entire screen. Cases:</p>
  
  <ul>
  <li><p><code>content.height &gt; screen.height</code> : works; swiping top/bottom expands and collapses the toolbar, as well as scrolling content;</p></li>
  <li><p><code>content.height &lt; screen.height</code> : doesn't. That's <strong>not</strong> good, because most of the times <code>(content.height + expandedToolbar.height) &gt; screen.height</code>!</p></li>
  </ul>
  
  <p>In other words, when content is not tall enough, <strong>even if content+expandedToolbar is much taller than the whole screen</strong>, it doesn't react to scroll gestures and shows some bugs - it might take ten gestures to collapse the toolbar a little bit. So you can hardly reach the bottom part of the content, which <strong>is hidden</strong> at the bottom because the toolbar is expanded.</p>
  
  <p>Any workaround?</p>
  
  <p>If you want to try, just take the <a href="https://github.com/chrisbanes/cheesesquare">cheesesquare</a> sample project and delete (or reduce) the content inside <code>NestedScrollView</code> in activity_detail.xml [API17 here]</p>