Error with icon, vibration and sound in notification

Question

I’m developing an app that receives notifications coming from firebase, I’m able to receive notifications quietly when the application is open, everything I’ve instated in Notificationcompat works, however when the application is in the background nothing works, the message is displayed with title and content, but the icon and sounds are not called. Could someone help me.

Class to receive the message

public class MyFirebaseMessagingService extends FirebaseMessagingService {


private static final String TAG = "MyFirebaseMsgService";

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {


    Log.d(TAG, "From: " + remoteMessage.getFrom());

   if (remoteMessage.getData().size() > 0) {
    Log.d(TAG, "Message data payload: " + remoteMessage.getData());
    }

   if (remoteMessage.getNotification() != null) {
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
    }



    notifyuer(remoteMessage.getFrom(), remoteMessage.getNotification().getBody());
    // Also if you intend on generating your own notifications as a result of a received FCM
    // message, here is where that should be initiated. See sendNotification method below.
}

public void notifyuer(String from, String notification){
    MyNotificationManager myNotificationManager = new MyNotificationManager(getApplicationContext());
    myNotificationManager.showNotificacao(from,notification, new Intent(getApplicationContext(),MainActivity.class));

 }

Class of custom notification

public class MyNotificationManager {
private Context context;

public MyNotificationManager(Context context){
    this.context = context;
}

public void showNotificacao(String from, String notification, Intent intent){
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0 /* Request code */, intent,
            PendingIntent.FLAG_UPDATE_CURRENT);



    //long[] vibrar = {150,400,150,800};


    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context);

           Notification mNotification = notificationBuilder
            .setContentIntent(pendingIntent)
            .setSmallIcon(R.drawable.logocinza64)
            .setContentTitle("S.I.C.C.")
            .setContentText(notification)
            .setAutoCancel(true)
            .setVibrate(new long[]{ 100, 250, 100, 500, 800})
            .build();

    mNotification.flags |= Notification.FLAG_AUTO_CANCEL;


    NotificationManager notificationManager =
            (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

    try{
        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        Ringtone toque = RingtoneManager.getRingtone(context,defaultSoundUri);
        toque.play();

    }catch (Exception e){

    }

    notificationManager.notify(0 /* ID of notification */, mNotification);
 }

}