[dotnet] Add ChromiumNetworkConditions to command serialization (#14716)

Author: pnatashap

dotnet/src/webdriver/Command.cs

@@ -157,6 +157,7 @@ private static Dictionary<string, object> ConvertParametersFromJson(string value
     // Selenium WebDriver types
     [JsonSerializable(typeof(char[]))]
     [JsonSerializable(typeof(byte[]))]
+    [JsonSerializable(typeof(Chromium.ChromiumNetworkConditions))]
     [JsonSerializable(typeof(Cookie))]
     [JsonSerializable(typeof(ReturnedCookie))]
     [JsonSerializable(typeof(Proxy))]