[firebase_messaging]: `onMessage.listen` is not triggered on MacOS when app is in foreground

### Is there an existing issue for this?

- [x] I have searched the existing issues.

### Which plugins are affected?

Messaging

### Which platforms are affected?

macOS

### Description

This code :

```
FirebaseMessaging.onMessage.listen((RemoteMessage event) {
print("Message received in app : ${event.toMap()}");
});
```

Seems to not log anything when receiving a Push notification when the app is in the foreground on MacOS.
It works fine on Android / iOS but not on my Mac (on the same app with the same server code sending the same push notification)

### Reproducing the issue

1. Create a sample app or use the plugin example if it allows it
2. Use this code :

```dart
Future initialize() async {
NotificationSettings settings = await FirebaseMessaging.instance
.requestPermission(sound: true, carPlay: true);

if (settings.authorizationStatus == AuthorizationStatus.authorized ||
settings.authorizationStatus == AuthorizationStatus.provisional) {
_getToken();

print("Initializing the message listener...");
FirebaseMessaging.onMessage.listen((RemoteMessage event) {
print("Message received in app : ${event.toMap()}");
});
}
}

Future _getToken() async {
String? apnsToken = await FirebaseMessaging.instance.getAPNSToken();
print("APNS Token : $apnsToken on ${Platform.operatingSystem}");
String token = await FirebaseMessaging.instance.getToken() ?? "";
print("FCM Token : $token on ${Platform.operatingSystem}");
}
```

3. Send a push notification from the server (to the tokens of the MacOS target, not from FCM dashboard)
4. See that you have no log "Message received in app"

### Firebase Core version

3.13.0

### Flutter Version

3.29.3

### Relevant Log Output

```shell

```

### Flutter dependencies

Expand Flutter dependencies snippet

```yaml

Replace this line with the contents of your `flutter pub deps -- --style=compact`.

```

### Additional context and comments

_No response_