Upgrade `libwebrtc-bin` to 131.0.6778.139 version #2302

Job	Run time
clippy (linux)	1m 2s
dartfmt	45s
dartanalyze	1m 2s
build (linux)	1m 36s
clippy (macos)	53s
clippy (windows)	1m 45s
build (macos)	3m 48s
build (windows)	4m 52s
ktfmt	8s
rustdoc (linux)	54s
rustfmt	14s
rustdoc (macos)	48s
swiftformat	8s
rustdoc (windows)	2m 50s
test (example, ${{ matrix.platform }})	0s
dart pub publish (pub.dev)	0s
pr	0s
release (GitHub)	0s
	20m 45s

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