Update `RTCRtpCodec` #1605

Job	Run time
build_nightly	1m 39s
build_examples	4m 4s
build_benchmarks	1m 3s
Check	1m 9s
Verify that web-sys is compiled correctly	56s
Clippy	5m 20s
dist_linux_aarch64_gnu	2m 56s
dist_linux_x86_64_musl	2m 23s
dist_macos_aarch64	1m 54s
dist_windows	3m 6s
dist_macos_x86_64	1m 53s
doc_api	1m 19s
doc_book	14s
Rustfmt	18s
Build and test the deno example	54s
Run js-sys crate tests	2m 23s
Run native tests	1m 46s
Run wasm-bindgen crate tests with multithreading enabled	3m 32s
Test TypeScript output of wasm-bindgen	1m 22s
Run UI compile-fail tests	1m 28s
Run wasm-bindgen crate tests (unix)	9m 22s
Run web-sys crate tests	4m 5s
Run wasm-bindgen-webidl crate tests	2m 30s
test_examples	2m 33s
deploy	2m 22s
	1h 0m 31s

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