audio and video processing engine multimedia server (system services)

 PipeWire is a server and user space API to deal with multimedia
 pipelines. This includes:
 .
  - Making available sources of audio and video (such as from a capture devices
    or application provided streams) and multiplexing this with clients.
  - Accessing sources of audio and video for consumption.
  - Generating graphs for audio and video processing.
 .
 This package contains the systemd system services. NOTE: This is NOT the
 recommended way to use PipeWire, but these services are provided for specific
 use cases like embedded and accessibility.