Backport {base,}sdk,hmi: Add WirePlumber policy roles

Add WirePlumber policy roles for Apertis based on Apertis Audio management concept sample
This allows an audio player like Rhythmbox to be corked by the video application, and restart playing when the video is done.

The WirePlumber alsa rules are specific for each hw devices, so this overlay can be shared between SDK and HMI.
This will simplify WirePlumber overlay maintenance.

https://phabricator.apertis.org/T8157

Signed-off-by: Frédéric Danis frederic.danis@collabora.com