AGL Bluetooth Integration

Automotive Grade Linux's modern Flutter UI framework lacks native Bluetooth connectivity. The legacy Bluetooth services cannot be reused because they depend on afb-daemon, unavailable in the current runtime. This project builds a native C++ Bluetooth plugin bridging Flutter with the open-source BlueZ stack via typed MethodChannels. Deliverables include a Yocto layer for system dependencies, a reliable Bluetooth abstraction library, a reactive settings UI for device pairing, and A2DP/AVRCP integration in the media player. Stretch goals include HFP telephony, PBAP contacts, and MAP messaging. This demonstrates production-grade automotive audio routing using purely open-source technologies.