Make a friendlier RTCVideoCodecInfo initializer.

webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm

Index: webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm b/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
index 1be33f0a8ff98a35e1c7a25203a3eab41a6ce460..c82c37f0f7c75cadc4c800450873624477582c38 100644
--- a/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
+++ b/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
@@ -32,6 +32,11 @@
   return self;
 }
 
+- (instancetype)initWithName:(NSString *)name
+                  parameters:(nullable NSDictionary<NSString *, NSString *> *)parameters {
+  return [self initWithPayload:0 name:name parameters:(parameters ? parameters : @{})];
+}
+
 - (instancetype)initWithNativeVideoCodec:(cricket::VideoCodec)videoCodec {
   NSMutableDictionary *params = [NSMutableDictionary dictionary];
   for (auto it = videoCodec.params.begin(); it != videoCodec.params.end(); ++it) {