Adding codecs to the RtpParameters returned by an RtpSender.

webrtc/api/objc/RTCRtpParameters.h

Index: webrtc/api/objc/RTCRtpParameters.h
diff --git a/webrtc/api/objc/RTCRtpParameters.h b/webrtc/api/objc/RTCRtpParameters.h
index d38e9ef64749b01bbbbdf522fd9b645cb67c051a..cc6c5dd80ac46ee9946716462ac6e97bdd905d93 100644
--- a/webrtc/api/objc/RTCRtpParameters.h
+++ b/webrtc/api/objc/RTCRtpParameters.h
@@ -10,6 +10,7 @@
 
 #import <Foundation/Foundation.h>
 
+#import "webrtc/api/objc/RTCRtpCodecParameters.h"
 #import "webrtc/api/objc/RTCRtpEncodingParameters.h"
 
 NS_ASSUME_NONNULL_BEGIN
@@ -19,6 +20,9 @@ NS_ASSUME_NONNULL_BEGIN
 /** The currently active encodings in the order of preference. */
 @property(nonatomic, copy) NSArray<RTCRtpEncodingParameters *> *encodings;
 
+/** The negotiated set of send codecs in order of preference. */
+@property(nonatomic, copy) NSArray<RTCRtpCodecParameters *> *codecs;
+
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
 
 @end