haturatu/kathttp3 ? reverse-engineered prompt

Build me an Android HTTP 3 client library that works on API 26 and up, and does not rely on Cronet.

I want a native core in C plus plus that handles the QUIC and HTTP 3 networking itself, with a clean stable native bridge and a Kotlin coroutine based API on top. It should support the basics a real app needs, like sending requests, reading responses, following redirects, cookies, cancellation, and handling network changes cleanly. Also include a small Jetpack Compose example app that shows how to make a request and display the result.

Please make it build on desktop for tests and on Android as a library or AAR. Add a simple test setup, native checks, and clear build instructions so I can compile the native dependencies and run the example. If you need to confirm current build or dependency details, look up the latest docs online first.