fix: obs failed to publish video

[giangndm]

Description

This PR fixed missing for handling non-simulcast h264 video packet.

Related Issue

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Checklist

• [x] I have tested the changes locally.
• [x] I have reviewed the code changes.
• [ ] I have updated the documentation, if necessary.
• [ ] I have added appropriate tests, if applicable.

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Additional Notes

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 40.58%. Comparing base (27d88bc) to head (81045c4). Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/transport_webrtc/src/media/h264.rs	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #441 +/- ## ======================================= Coverage 40.57% 40.58% ======================================= Files 161 161 Lines 17583 17582 -1 ======================================= Hits 7135 7135 + Misses 10448 10447 -1 ```

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