message: transport controller: move ice transport initialization
  out of the DTLS transport creation and into the ICE transport
  creation.
  Cr-Commit-Position: refs/heads/main@{#38541}
diff: @@ -399,8 +399,13 @@ JsepTransportController::CreateIceTransport(const std::string& transport_name,
  init.set_async_dns_resolver_factory(async_dns_resolver_factory_);
  init.set_event_log(config_.event_log);
  init.set_field_trials(config_.field_trials);
  - return config_.ice_transport_factory->CreateIceTransport(
  + auto transport = config_.ice_transport_factory->CreateIceTransport(
  transport_name, component, std::move(init));
  + RTC_DCHECK(transport);
  + transport->internal()->SetIceRole(ice_role_);
  + transport->internal()->SetIceTiebreaker(ice_tiebreaker_);
  + transport->internal()->SetIceConfig(ice_config_);
  + return transport;
  }
  std::unique_ptr<cricket::DtlsTransportInternal>
  @@ -421,9 +426,8 @@ JsepTransportController::CreateDtlsTransport(
  }
  RTC_DCHECK(dtls);
  - dtls->ice_transport()->SetIceRole(ice_role_);
  - dtls->ice_transport()->SetIceTiebreaker(ice_tiebreaker_);
  - dtls->ice_transport()->SetIceConfig(ice_config_);
  + RTC_DCHECK_EQ(ice, dtls->ice_transport());
  +
  if (certificate_) {
  bool set_cert_success = dtls->SetLocalCertificate(certificate_);
  RTC_DCHECK(set_cert_success);
  @@ -1035,7 +1039,6 @@ RTCError JsepTransportController::MaybeCreateJsepTransport(
  rtc::scoped_refptr<webrtc::IceTransportInterface> ice =
  CreateIceTransport(content_info.name, /*rtcp=*/false);
  - RTC_DCHECK(ice);
  std::unique_ptr<cricket::DtlsTransportInternal> rtp_dtls_transport =
  CreateDtlsTransport(content_info, ice->internal());
  