To be merged after !2906.
-- v2: wineoss: Use mmdevapi's AudioClient2. winecoreaudio: Use mmdevapi's AudioClient2. winealsa: Use mmdevapi's AudioClient2. winepulse: Move AudioClient2 into mmdevapi. wineoss: Use mmdevapi's AudioClient3. winecoreaudio: Use mmdevapi's AudioClient3. winealsa: Use mmdevapi's AudioClient3. winepulse: Move AudioClient3 into mmdevapi.