Provide parameters for pulseaudio's echo-cancel-module

We currently don't set any additional arguments for pulseaudio's echo canceller module:
https://git.jami.net/savoirfairelinux/ring-daemon/-/blob/504e54608267a257e14acc84daea236b1fd4f85a/src/media/audio/pulseaudio/audiostream.cpp#L59

Various GNU/Linux distributions such as Debian and its derivatives don't load the echo canceller module in /etc/pulseaudio/default.pa at all or with any additional parameters, so we can't rely on that.

We should look into providing additional arguments -- like the ones below -- ourselves when creating the pulseaudio stream.

For reference: example of loading the echo canceller module with additional arguments in a pulseaudio config file (thanks @atraczyk):

load-module module-echo-cancel use_volume_sharing=1 use_master_format=1 aec_method=webrtc aec_args="digital_gain_control=1 experimental_agc=1 analog_gain_control=0 noise_suppression=1 voice_detection=1 extended_filter=1" source_name=echoCancel_source sink_name=echoCancel_sink