app center；增加發送ping的秒

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

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+using System;
+using UnityEngine;
+
+#if UNITY_ANDROID && !UNITY_EDITOR
+using Microsoft.AppCenter.Unity.Internal.Utility;
+namespace Microsoft.AppCenter.Unity.Analytics.Internal
+{
+    class EventPropertiesInternal
+    {
+        public static AndroidJavaObject Create()
+        {
+            return new AndroidJavaObject("com.microsoft.appcenter.analytics.EventProperties");
+        }
+
+        public static void SetString(AndroidJavaObject properties, string key, string val)
+        {
+            properties.Call<AndroidJavaObject>("set", key, val);
+        }
+
+        public static void SetNumber(AndroidJavaObject properties, string key, long val)
+        {
+            properties.Call<AndroidJavaObject>("set", key, val);
+        }
+
+        public static void SetNumber(AndroidJavaObject properties, string key, double val)
+        {
+            properties.Call<AndroidJavaObject>("set", key, val);
+        }
+
+        public static void SetBool(AndroidJavaObject properties, string key, bool val)
+        {
+            properties.Call<AndroidJavaObject>("set", key, val);
+        }
+
+        public static void SetDate(AndroidJavaObject properties, string key, DateTime val)
+        {
+            properties.Call<AndroidJavaObject>("set", key, JavaDateHelper.DateTimeConvert(val));
+        }
+    }
+}
+#endif