[KCM] Add speaker placement test
Summary:
An equivalent to the Phonon KCM speaker test.
One step closer to T9091
Stereo:
5.1:
7.1:
Test Plan:
When siwtching profiles the appropriate setup is shown.
Sound is working for Stereo, 5.1/7.1 is not tested because I don't have the hardware for it.
Known issue:
Input-only profile still shows Front-left and front-right
Reviewers: drosca
Reviewed By: drosca
Subscribers: ngraham, VDG, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D13931