title: Provide additional provider in MatDialog
body: <p>Imagine you have Angular service without provideIn, so it is available only in certain components and their children. Now one such component opens MatDialog -- is it possible to have that service injected there? </p>
  
  <p>As I see by default Angular does not count MatDialog component as a child of caller component and also I do not see any settings to change that.</p>
  
  <p>P.S. Service here is stateful, so just putting it to providers of MyDialogComponent will create new service, which is not desired.</p>