title: Single activity app with Navigation Component and Navigation Drawer
body: <p>I want to create a Single Activity app which will contain for simplicity only the following screens:
  Landing, Login, Register, Home, Profile. The Home and Profile screens will be visible to the user only if is logged in and will belong to a Navigation Drawer.</p>
  <p>Unfortunately what comes to my mind is to create an Activity with nav_graph_1, that contains the following destinations: Landing, Login, Register.
  Then create another Activity with nav_graph_2 (Home and Profile destinations) that will contain all the setup for the Navigation Drawer: e.g. <code>setupActionBarWithNavController</code>, appBarConfiguration with the nav_graph_2 and the drawer.</p>
  <p>Is it possible to implement the above in a Single Activity app and how?</p>