參考帖子：
http://nameless-technology.blogspot.com/2013/11/custom-system-service-using-xposedbridge.html?m=1
https://haoutil.com/topic/xposed-add-custom-system-service
https://jayfeng.com/2017/05/17/Xposed開發實踐/
https://www.cnblogs.com/wyxy2005/p/7987543.html
廣播沒有回調
Aidl我不太熟悉（如有大佬，請指教）
最後註冊Netty可以