To be merged after !2907.
-- v6: wineoss: Use mmdevapi's AudioClient's GetService. winecoreaudio: Use mmdevapi's AudioClient's GetService. winealsa: Use mmdevapi's AudioClient's GetService. winepulse: Move AudioClient's GetService into mmdevapi. winepulse: Lock sessions in AudioClient's GetService. wineoss: Use mmdevapi's session_wrapper_create. winecoreaudio: Use mmdevapi's session_wrapper_create. winealsa: Use mmdevapi's session_wrapper_create. winepulse: Move session_wrapper_create into mmdevapi. winepulse: Always initialize ref to 1 in session wrapper.