public App()
{
InitializeComponent();
LinphoneManager = DependencyService.Get <ILinphoneManager>();
MainPage = new NavigationPage(new MainPage());
}
public void SetVideoView(CallPCL call, ILinphoneManager linphone)
{
contentViewVideo.IsVisible = true;
contentViewVideo.Content = new LinphoneVideoView();
linphone.SetViewCall(call);
}