Add video codec setting to AppRTCMobile on iOS.

webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsStore.h

Index: webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsStore.h
diff --git a/webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsStore.h b/webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsStore.h
index 69e10e3bd560ea574277c94ac61fe624b313ecf1..0ecca2ab07c53b4691973710f6c070518ff67d51 100644
--- a/webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsStore.h
+++ b/webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsStore.h
@@ -31,6 +31,17 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)setVideoResolutionConstraints:(NSString *)value;
 
 /**
+ * Returns current video codec stored in the store.
+ */
+- (nullable NSString *)videoCodec;

[kthelgason, 2017/03/09 13:39:43]

not nullable?

[sakal, 2017/03/10 10:25:28]

Actually I can make this property as well.

+
+/**
+ * Stores the provided value as maximum bitrate setting.
+ * @param value the number to be stored
+ */
+- (void)setVideoCodec:(nullable NSString *)value;

[kthelgason, 2017/03/09 13:39:43]

ditto

[sakal, 2017/03/10 10:25:28]

Done.

+
+/**
  * Returns current max bitrate number stored in the store.
  */
 - (nullable NSNumber *)maxBitrate;