Fix MKV dolby vision webOS < 25 and fix seek when not in direct play

[DanOl98]

WebOS < 25 does not support dolby vision content on MKV container, ask for remuxing if dolby vision content with mkv container is requested (note: remuxing, not transcoding, the content is unchanged!).
This fixes #167 . However, there is another problem to fix, at least on my LG C1 (this problem was already present prior to this PR): When the content is being remuxed, the video restarts from the beginning and seeking does not work.

Pull Request

Summary

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Related Issues

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• Fixes [Playback] Dolby Vision not supported on LG TV #167

Type of Change

• [ X ] Bug fix
• New feature
• Refactor
• Performance improvement
• UI/UX update
• Documentation update
• Build/CI change
• Other (describe):

Changes Made

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Platform

• Tizen (Samsung)
• [ X ] webOS (LG)
• Both / Shared code

Testing

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• Tested on emulator
• [ X ] Tested on physical device
• Manual testing completed
• Not tested (explain why):

Test Steps

1. Start Dolby vision content with mkv container on WebOS < 25
2. Now Dolby vision works and doesn't fallback to HDR anymore

Screenshots (if applicable)

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Checklist

• [ X ] Code builds successfully
• [ X ] Code follows project style and conventions
• [ X ] No unnecessary commented-out code
• [ X ] No new warnings introduced

[github-actions]

✅ Build Successful

All platform builds passed. You can download the test artifacts below.

Platform	Status	Artifact
webOS	✅ Passed	Moonfin_webOS_*.ipk
Tizen Regular	✅ Passed	Moonfin_Tizen_Regular_*.wgt
Tizen Oblong	✅ Passed	Moonfin_Tizen_Oblong_*.wgt
Tizen Legacy	✅ Passed	Moonfin_Tizen_Legacy_*.wgt

Property	Value
Commit	682f601
Workflow run	Build #79

[DanOl98]

Seek when transcoding/remuxing videos fixed too.
video url must not be rewritten with StartTimeTicks, jellyfin server does not allow it. seek must be managed exactly like a normal video

#102 should be fixed too, it looks like the problem could be the same (unsupported container -> remuxing -> broken seek)

And I guess #107 too (seeking was broken when transcoding because of unsupported audio codec)