app center；增加發送ping的秒

Assets/AppCenter/Plugins/AppCenterSDK/Crashes/Models/Exception.cs

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+namespace Microsoft.AppCenter.Unity.Crashes.Models
+{
+    public class Exception
+    {
+        public string Message { get; private set; }
+        public string StackTrace { get; private set; }
+
+        public Exception(string message, string stackTrace)
+        {
+            Message = message;
+            StackTrace = stackTrace;
+        }
+    }
+}