Default-off selected-UID Android playback capture through the pinned WebRTC ADM callback, with no microphone/system-mix fallback and no server/Viewer wire change. Source compile/protocol acceptance and remaining device gates are recorded in the PR.
Add the Android 14+ MediaProjection direct-child sender, focused protocol tests, compile gate, and durable mobile/TV capability boundaries. Local official-SDK acceptance passed after GitHub runners were blocked before step execution by account billing.