fix negotiation crash with CallFactoryInterface for media & moved RTCEngine code to EngineInternal

crates/livekit-webrtc/libwebrtc-sys/src/peer_connection_factory.cpp

@@ -30,6 +30,7 @@ PeerConnectionFactory::PeerConnectionFactory(
   dependencies.task_queue_factory = webrtc::CreateDefaultTaskQueueFactory();
   dependencies.event_log_factory = std::make_unique<webrtc::RtcEventLogFactory>(
       dependencies.task_queue_factory.get());
+  dependencies.call_factory = webrtc::CreateCallFactory();
 
   cricket::MediaEngineDependencies media_deps;
   media_deps.task_queue_factory = dependencies.task_queue_factory.get();

crates/livekit-webrtc/libwebrtc-sys/src/webrtc.cpp

@@ -8,7 +8,7 @@
 
 namespace livekit {
 RTCRuntime::RTCRuntime() {
-  // rtc::LogMessage::LogToDebug(rtc::LS_INFO);
+  rtc::LogMessage::LogToDebug(rtc::LS_INFO);
   RTC_LOG(LS_INFO) << "RTCRuntime()";
   RTC_CHECK(rtc::InitializeSSL()) << "Failed to InitializeSSL()";