app center；增加發送ping的秒

Assets/AppCenter/Plugins/AppCenterSDK/Analytics/Blank/EventPropertiesInternal.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+#if (!UNITY_IOS && !UNITY_ANDROID && !UNITY_WSA_10_0) || UNITY_EDITOR
+using System;
+
+namespace Microsoft.AppCenter.Unity.Analytics.Internal
+{
+#if UNITY_IOS
+    using RawType = System.IntPtr;
+#elif UNITY_ANDROID
+    using RawType = UnityEngine.AndroidJavaObject;
+#else
+    using RawType = System.Object;
+#endif
+
+    class EventPropertiesInternal
+    {
+        public static RawType Create()
+        {
+            return default(RawType);
+        }
+
+        public static void SetString(RawType properties, string key, string val)
+        {
+        }
+
+        public static void SetNumber(RawType properties, string key, object val)
+        {
+        }
+
+        public static void SetBool(RawType properties, string key, bool val)
+        {
+        }
+
+        public static void SetDate(RawType properties, string key, DateTime val)
+        {
+        }
+    }
+}
+#endif