Add ice trickling supported bool

Author: ValorZard

offeransweroptions.go

@@ -9,6 +9,10 @@ type OfferAnswerOptions struct {
 	// VoiceActivityDetection allows the application to provide information
 	// about whether it wishes voice detection feature to be enabled or disabled.
 	VoiceActivityDetection bool
+	// ICETricklingSupported indicates whether the ICE agent should use trickle ICE
+	// If set, the "a=ice-options:trickle ice2" attribute is added to the generated SDP payload.
+	// (See https://datatracker.ietf.org/doc/html/rfc9725#section-4.3.3)
+	ICETricklingSupported bool
 }
 
 // AnswerOptions structure describes the options used to control the answer