Align BWE ArrivalGroup calculation with libwebrtc implementation #2157

Job	Run time
lint	49s
test_wincrypto (windows-latest, stable)	1m 11s
test (ubuntu-latest, stable)	3s
cargo-deny (aarch64-apple-ios)	23s
test_wincrypto (windows-latest, beta)	1m 14s
test (ubuntu-latest, beta)	26s
cargo-deny (aarch64-linux-android)	19s
test_wincrypto (windows-latest, 1.71.1)	1m 1s
test (ubuntu-latest, 1.71.1)	22s
cargo-deny (i686-pc-windows-gnu)	19s
test (macos-latest, stable)	28s
cargo-deny (i686-pc-windows-msvc)	20s
test (macos-latest, beta)	27s
cargo-deny (i686-unknown-linux-gnu)	19s
test (macos-latest, 1.71.1)	29s
cargo-deny (wasm32-unknown-unknown)	18s
test (windows-latest, stable)	1s
cargo-deny (x86_64-apple-darwin)	19s
test (windows-latest, beta)	26s
cargo-deny (x86_64-apple-ios)	20s
test (windows-latest, 1.71.1)	26s
cargo-deny (x86_64-pc-windows-gnu)	22s
cargo-deny (x86_64-pc-windows-msvc)	21s
cargo-deny (x86_64-unknown-linux-gnu)	21s
cargo-deny (x86_64-unknown-redox)	18s
	11m 22s

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