mixer: Add cards settings into pulseaudio backend

Summary:
This commit bring the support to set a profile on audio hardware via
pulseaudio. You are now able to configure the output of your audio
hardware via emixer without the help of pavucontrol.

@fix T3127

Reviewers: zmike!, devilhorns

Subscribers: cedric

Tags: enlightenment-git

Maniphest Tasks: T3127

Differential Revision: https://phab.enlightenment.org/D7569