Some audio hardware reports output jacks as "Line Out" rather than
"Headphone" or generic analog outputs. Without an explicit "Line Out"
element in the SPA configuration, these ports may be ignored or
misidentified, leading to missing output options in desktop settings.
This change adds "Line Out" as a recognized element in both the
headphones and lineout SPA configuration files, improving compatibility
with a wider range of audio devices.
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