[pulseaudio] For source, default timeout should be disconnection ASAP (#15314)

[pulseaudio] For source, default timeout should be disconnection ASAP (#15314)

* [pulseaudio] For source,  default timeout should be disconnection ASAP

To avoid weird behaviour, such as pulseaudio server storing audio data between inputstream get/read and then sending the backlog all at once when finally reading, we must disconnect immediately thereafter.

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Signed-off-by: Gwendal Roulleau <gwendal.roulleau@gmail.com>
Co-authored-by: Gwendal Roulleau <gwendal.roulleau@gmail.com>