RikkaApps/Shizuku ? reverse-engineered prompt

Build me an Android app and background service like Shizuku that lets normal apps use system level Android features through a helper process started with ADB or root.

I want a simple manager app where the user can start the service, see whether it is running, and get clear guidance for setup. The service should act as a middle layer between apps and Android system services, so apps can do things like read installed apps or perform other privileged system actions without shell commands. Make it work smoothly across Android versions as much as possible, and handle the case where ADB permissions are limited.

Please include a clean API layer for other apps to connect to the service, plus a sample flow that shows how an app would talk to it. If something needs current Android documentation or hidden API workarounds, look those up online if needed. Keep the experience polished, reliable, and easy for users to understand.