Eyevinn / mp4ff / 28238477989

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feat: support Dolby Vision HEVC sample entries and configuration boxes

Port and extend the Dolby Vision HEVC support from the eluvio/ss/mvhevc branch, verified against "Dolby Vision Streams Within the ISO Base Media File Format" v2.0.

- Register dvh1/dvhe sample entries (decoded as VisualSampleEntryBox, mapped to StsdBox.HvcX); dvh1 behaves like hvc1 and dvhe like hev1 in TrakBox.SetHEVCDescriptor and CENC/CBCS encryption (InitProtect/ExtractInitProtectData).
- Add DoViConfigurationBox for the Dolby Vision Configuration Box (dvcC for dv_profile <= 7, dvvC for 8-9, dvwC for >= 10) carrying the DOVIDecoderConfigurationRecord, wired as VisualSampleEntryBox.DoViConfig.

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