split webrtc ConnectPeer function.

internal/types/webrtc.go

@@ -1,5 +1,7 @@
 package types
 
+import "github.com/pion/webrtc/v3"
+
 type WebRTCPeer interface {
 	SignalAnswer(sdp string) error
 	Destroy() error
@@ -8,5 +10,9 @@ type WebRTCPeer interface {
 type WebRTCManager interface {
 	Start()
 	Shutdown() error
-	CreatePeer(session Session) (string, bool, []string, error)
+
+	ICELite() bool
+	ICEServers() []string
+
+	CreatePeer(session Session) (*webrtc.SessionDescription, error)
 }