capture.rs still constructed the PipeWire main loop and context via the
0.8 owning constructors (MainLoop::new / Context::new / connect_fd),
which pipewire 0.9.2 removed in favour of the Rc handle types. The
migration was partial — StreamBox::new was already 0.9 — so the
wayland-pipewire feature failed to compile with E0599.
Switch to MainLoopRc::new / ContextRc::new(&loop, None) / connect_fd_rc.
The downstream call sites are unchanged: MainLoopRc derefs to MainLoop
(run/quit/clone), ContextRc derefs to Context, and CoreRc derefs to
Core so StreamBox::new(&core, ...) still coerces.
Fixes#7885
roboomp
30264cb151