Make the default NavBackStackEntry ViewModelFactory stateless
Mentioned issues (1)
P1
Integrate ViewModel CreationExtras APIs into NavBackStackEntry
“ ni seirtnEkcatSkcaBvaN rof sartxEnoitaerCtluafed eht gnidda nehWhttps://issuetracker.google.com/207012490, we should have also made the default ViewModelFactory stateless so that when using the default factory, we actually created view models via the extras. ”