proxy: Allow audio stream outside of container

Authored by stefanzzz on Jul 21 2017, 5:49 PM.

Description

proxy: Allow audio stream outside of container

Allows using supported audio streams even if they are not inside
a container.

Fixes T7756.

Reviewed-by: Alex Băluț <alexandru.balut@gmail.com>
Differential Revision: https://phabricator.freedesktop.org/D1800