Parse YT-EXT-AUDIO-CONTENT-ID for multiple language detection in YouTube HLS Manifests.

[clienthax]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

Properly parse YT-EXT-AUDIO-CONTENT-ID when present in HLS manifests to determine correct audio streams.
Fixes ability to specify languages for YouTube when using hls manifests with the following arguments which would otherwise just fall back to the first entry.

Some additional logic may be required to return the 'original' audio when no language is defined?

yt-dlp -f mp4[height<=?1080][language=en]/best[height<=?1080][language=en] --verbose --list-formats --no-cache-dir --rm-cache-dir --get-url --impersonate safari https://www.youtube.com/watch?v=4ofJpOEXrZs

Template

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• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests
• Checked the code with flake8 and ran relevant tests

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• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
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