Fix build warnings and clippy warnings

[dhilipsiva]

Pull Request

Fix Cargo Build Warning and Clippy Warnings

Checklist

• [x] I have tested the changes locally.
• [x] I have reviewed the code changes.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 65.78947% with 52 lines in your changes missing coverage. Please review.

Project coverage is 43.82%. Comparing base (c459b13) to head (324c3ba).

Files	Patch %	Lines
packages/transport_webrtc/src/transport/webrtc.rs	0.00%	14 Missing :warning:
packages/media_connector/src/agent_service.rs	0.00%	6 Missing :warning:
packages/media_connector/src/handler_service.rs	0.00%	6 Missing :warning:
...rnal/local_track/packet_selector/video_h264_sim.rs	78.26%	5 Missing :warning:
...ernal/local_track/packet_selector/video_vp9_svc.rs	86.48%	5 Missing :warning:
packages/media_gateway/src/agent_service.rs	0.00%	5 Missing :warning:
...ernal/local_track/packet_selector/video_vp8_sim.rs	90.69%	4 Missing :warning:
...s/media_core/src/endpoint/internal/remote_track.rs	0.00%	2 Missing :warning:
bin/src/http/api_console.rs	0.00%	1 Missing :warning:
bin/src/server/connector.rs	0.00%	1 Missing :warning:
... and 3 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #328 +/- ## ========================================== - Coverage 43.89% 43.82% -0.07% ========================================== Files 117 117 Lines 12984 12982 -2 ========================================== - Hits 5699 5690 -9 - Misses 7285 7292 +7 ```

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[dhilipsiva]

@giangndm Thank you for your response. I have addressed all your questions. Please let me know if you have more questions or feedbacks.

[dhilipsiva]

@giangndm I have updated the code as per your feedbacks. Please let me know if I need to do more changes.