Fix access modifiers for HLSResolution properties

[subbotkin]

Description

This PR fixes issue #8

Change Notes

• Explicitly specified public access control level for w, h, ratio, is16x9 and is4x3 properties of HLSResolution struct

Pre-submission Checklist

• [x] I ran the unit tests locally before checking in.
• [x] I made sure there were no compiler warnings before checking in.
• [ ] I have written useful documentation for all public code.
• [ ] I have written unit tests for this new feature.

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