This app uses the Profile Test server to launch both Sink and Source profiles in a fake piconet, where they connect to each other and stream audio in an endless loop using the real system audio services.
Pass the --duration flag to specify how long it should run.
Include --with //src/connectivity/bluetooth/tests/bt-profile-test-server in your fx set.
To run:
fx shell run fuchsia-pkg://fuchsia.com/bt-a2dp-loopback#meta/bt-a2dp-loopback.cmx