title: CollapsingToolbarLayout setTitle() does not update unless collapsed
body: <p>With the new Design Library, we're supposed to set the toolbar title on the <code>CollapsingToolbarLayout</code>, not the <code>Toolbar</code> itself(at least when using the collapsing toolbar). But <code>setTitle()</code> only updates the title in the following specific circumstances:</p>
  <ol>
  <li><p>When the <code>CollapsingToolbarLayout</code> does not have a title yet</p>
  </li>
  <li><p>At the moment the <code>CollapsingToolbarLayout</code> becomes fully collapsed</p>
  </li>
  <li><p>At the moment the <code>CollapsingToolbarLayout</code> starts to expand</p>
  </li>
  </ol>
  <p>What I'm actually trying to do is make the title become an <code>EditText</code> when fully expanded, allowing the user to give his/her character a name, which then displays as the title. I've tried to force the issue by calling
  <code>invalidate()</code> or <code>requestLayout()</code>, as well as both of those methods on <code>CollapsingToolbarLayout</code>'s children. No effect.</p>