Implement REMB (Receiver Estimated Maximum Bitrate) #1413

Job	Run time
lint	31s
test (ubuntu-latest, stable)	1m 51s
cargo-deny (aarch64-apple-ios)	22s
test (ubuntu-latest, beta)	1m 37s
cargo-deny (aarch64-linux-android)	20s
test (ubuntu-latest, 1.65.0)	2m 8s
cargo-deny (i686-pc-windows-gnu)	21s
test (macos-latest, stable)	2m 21s
cargo-deny (i686-pc-windows-msvc)	20s
test (macos-latest, beta)	2m 29s
cargo-deny (i686-unknown-linux-gnu)	21s
test (macos-latest, 1.65.0)	4m 5s
test (windows-latest, stable)	3m 2s
cargo-deny (wasm32-unknown-unknown)	21s
test (windows-latest, beta)	2m 59s
cargo-deny (x86_64-apple-darwin)	29s
test (windows-latest, 1.65.0)	4m 12s
cargo-deny (x86_64-apple-ios)	23s
cargo-deny (x86_64-pc-windows-gnu)	19s
cargo-deny (x86_64-pc-windows-msvc)	21s
cargo-deny (x86_64-unknown-linux-gnu)	19s
cargo-deny (x86_64-unknown-redox)	22s
	29m 33s

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