Objective-C API to set the ICE check rate through RTCConfiguration.

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h

Index: webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
index b7290804bc2efd8088fe199e6799b45534a36e9d..c5162409e0254ef3768284e87af61b5039d05055 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
@@ -104,6 +104,11 @@ RTC_EXPORT
  */
 @property(nonatomic, assign) BOOL shouldPresumeWritableWhenFullyRelayed;
 
+/** If set to non-nil, controls the minimal interval between consecutive ICE
+ *  check packets.
+ */
+@property(nonatomic, copy, nullable) NSNumber *iceCheckMinInterval;
+
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
 
 @end