title: Xamarin Essentials Connectivity.ConnectivityChanged event is called twice
body: <p>I have tested both on iOS simulator and android emulator and found that <strong>&quot;Connectivity.ConnectivityChanged&quot; event triggers twice at a time</strong>.
  Whenever I changed the connectivity on virtual devices(emulator and simulator), the two times triggering issue replicates which deals in calling my function twice.</p>
  <p>I've also gone through this:
  <a href="https://github.com/xamarin/Essentials/issues/1068" rel="nofollow noreferrer">https://github.com/xamarin/Essentials/issues/1068</a> but found no solution.
  I am using the latest version of Xamarin Essentials till todays date i.e. 1.7.3.
  Is there any possible way to control this event?</p>