public override void OnReceive(Context context, Intent intent)
        {
            // https://developers.google.com/android/exposure-notifications/exposure-notifications-api#methods
            var action = intent.Action;

            if (action == ExposureNotificationClient.ActionExposureStateUpdated)
            {
                ExposureNotificationCallbackService.EnqueueWork(context, intent);
            }
            else if (action == "com.google.android.gms.exposurenotification.ACTION_EXPOSURE_NOT_FOUND")
            {
                Console.WriteLine($"C19R {nameof(ExposureNotificationCallbackBroadcastReceiver)} ACTION_EXPOSURE_NOT_FOUND.");
            }
        }
        public override void OnReceive(Context context, Intent intent)
        {
            // https://developers.google.com/android/exposure-notifications/exposure-notifications-api#broadcast-receivers
            var action = intent.Action;

            if (action == actionExposureStateUpdated)
            {
                global::Android.Util.Log.Debug("Xamarin.ExposureNotifications", "Exposure state updated.");

                ExposureNotificationCallbackService.EnqueueWork(context, intent);
            }
            else if (action == actionExposureNotFound)
            {
                global::Android.Util.Log.Debug("Xamarin.ExposureNotifications", "Exposure not found.");
            }
        }
		public override void OnReceive(Context context, Intent intent)
			=> ExposureNotificationCallbackService.EnqueueWork(context, intent);