Refactor/switch id3 functions with cml id3 functions

[felipeYoungi]

This PR will...

What improvements to ID3 Parsing will this change include?

• Removed the methods for id3 parsing,decoding and getting frames that were in hls.js(See the PR for further details) and replaced them with the same methods from CML.
• Added new unit tests in CML(these functions weren’t being tested before) for:
  • readId3Size
  • isId3Header
  • isId3Footer
  • decodeId3Frame
  • Added APIC Id3 for hls.js
  • Added Shaka’s id3 unit tests to CML.

Why is this Pull Request needed?

The id3 utilities have been manually implemented in multiple player libraries. When bugs need to be fixed, or features added, then need to be done across all of these projects. The common media library provides a single place for these utilities to live and be maintained.
Also hls.js doesn't parse id3 APIC data and with this change it is going to be able to handle that data.

What assets have these changes been tested against?

We tested this changes using 2 assets:
https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8
https://test-streams.mux.dev/dai-discontinuity-deltatre/manifest.m3u8
https://stream-cdn-1.open.fm/OFM18/ngrp:standard/playlist.m3u8(APIC between songs).

What history and roadmap for the CML can you share(based on which player code and tested for which application use cases)?

We currently use Github milestones (same as hls.js), in combination with the project board. We only have a few features officially planned, so the roadmap isn't very big:
https://github.com/streaming-video-technology-alliance/common-media-library/milestones

Checklist

• changes have been done against master branch, and PR does not conflict
• new unit / functional tests have been added

Would like to see de-duplication of utils and payload size before and after.