fix(transport-webrtc): detect terminal state at construction time #5280

Job	Run time
Build	3m 28s
Test example js-libp2p-example-chat	1m 17s
Test example js-libp2p-example-transports	1m 24s
Test example js-libp2p-example-discovery-mechanisms	1m 12s
Test example js-libp2p-example-browser-pubsub	1m 42s
Test example js-libp2p-example-custom-protocols	1m 9s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 19s
Test example js-libp2p-example-pnet	1m 1s
Test example js-libp2p-example-delegated-routing	2m 10s
Test example js-libp2p-example-peer-and-content-routing	1m 6s
Test example js-libp2p-example-webrtc-private-to-public	1m 39s
Test example js-libp2p-example-webrtc-private-to-private	2m 1s
Test example js-libp2p-example-pubsub	1m 21s
Test example js-libp2p-example-connection-encryption	1m 4s
Test example js-libp2p-example-circuit-relay	1m 2s
	22m 55s

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