Move B2LO to Bbr2Sender::ApplyConnectionOptions, this allows it to be set in uStreamer experiments.
Move B2LO to Bbr2Sender::ApplyConnectionOptions, this allows it to be set in uStreamer experiments.

PiperOrigin-RevId: 366804711
Change-Id: I33e97b49e7c2870971b359e4034e50e9b07e443a

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