protected override async Task OnInitializedAsync()
{
await base.OnInitializedAsync();
var connectionParameters = JsonSerializer.Deserialize <ConnectionParameters>(ConnectionParametersJson);
await CallViewModel.OnPageAppearingAsync(connectionParameters, ReRender);
}
protected override async void OnAppearing()
{
base.OnAppearing();
await XamarinSupport.SetCameraAndMicPermissionsAsync();
Xamarin.Essentials.DeviceDisplay.KeepScreenOn = true;
await _callViewModel.OnPageAppearingAsync(_connectionParameters);
}