title: How to set toolbar title from fragment using Navigation UI Component
body: <p>I have an activity with a toolbar from a default layout in Android Studio and I can easily change the title in the toolbar through the following method:</p>
  <pre><code>    Bundle bundle = new Bundle();
      bundle.putString(&quot;toolbarTitle&quot;, &quot;A new title&quot;);
  
      NavHostFragment
          .findNavController(this)
          .navigate(R.id.action_navigation_conversation_to_placeholder, bundle);
  </code></pre>
  <p>Where safe args is already implemented for <code>toolbarTitle</code> in the navigation menu layout.</p>
  <p>However now I am trying to change the title from the fragment that is opened via the method above, for example;</p>
  <ul>
  <li><p>MyActivity -&gt;opens-&gt; MyFragment</p>
  </li>
  <li><p>MyFragment changes title</p>
  </li>
  </ul>
  <p>I do know how to update it without using Navigation UI Components, but I want to use them if it is possible.</p>
  <p>Other similar questions are only related to the example I already provided above for when a new fragment is being opened or by suggesting the use of the typical method that does not make use of the Navigation UI Components, none cover this specific scenario.</p>