title: Navigation Component: pass safeArgs from activity to a fragment
body: <p>I have two graphs, so the first graph move from one fragment to an activity passing safeArgs to the activity.</p>
  
  <pre><code>val action = MyFragmentDirections.actionMyActivity(arg1, arg2)
  Navigation.findNavController(view).navigate(action)  
  </code></pre>
  
  <p>Now in the second, I want to pass these arguments from <code>MyActivity</code> to a fragment which belongs to this activity.</p>
  
  <p>I can get the args:</p>
  
  <pre><code>val args = MyActivity.fromBundle(intent.extras)
  </code></pre>
  
  <p>The problem is there is not a <code>Directions</code> file for this activity, so I can't pass the arguments.</p>