Используйте приложение APKPure
Историческую версию Send Push Notification можно получить на Android
Отправить push-уведомление в ваше приложение
Send push notification to your App to topics.
prerequisites:
1. Get server key from cloud messaging tab
2. You should know topic name subscribed by your app user.
This app is only for developers.
note: notification log stored locally if you uninstall app log will be cleared. you cannot restore it later.