DesignativeDave/androrat ? reverse-engineered prompt

Build me a simple remote support app for my own Android phone and a desktop control panel in Java.

I want the Android side to run quietly in the background only after the user has clearly opted in and paired the device. The desktop app should show connected devices, basic phone status like battery, network, and sensor info, plus a live activity log. Add a few safe actions like sending a toast, vibrating the phone, opening a URL, and showing the device on a map using GPS or network location.

Please make the interface easy to use, with separate tabs for general info, location, and device actions. It should be easy to connect, disconnect, and change the server address and port from a settings screen. If you need to check current docs or libraries, look them up online first.

Also include a clean way to send messages between the phone and desktop app, and make the whole thing feel like a real demo project I can run locally.