app center；增加發送ping的秒

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

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+#if UNITY_IOS && !UNITY_EDITOR
+using System;
+using System.Runtime.InteropServices;
+using Microsoft.AppCenter.Unity.Internal.Utility;
+
+namespace Microsoft.AppCenter.Unity.Analytics.Internal
+{
+    class EventPropertiesInternal
+    {
+        public static IntPtr Create()
+        {
+            return appcenter_unity_analytics_create_event_properties();
+        }
+
+        public static void SetString(IntPtr properties, string key, string val)
+        {
+            appcenter_unity_analytics_event_properties_set_string(properties, key, val);
+        }
+
+        public static void SetNumber(IntPtr properties, string key, long val)
+        {
+            appcenter_unity_analytics_event_properties_set_long(properties, key, val);
+        }
+
+        public static void SetNumber(IntPtr properties, string key, double val)
+        {
+            appcenter_unity_analytics_event_properties_set_double(properties, key, val);
+        }
+
+        public static void SetBool(IntPtr properties, string key, bool val)
+        {
+            appcenter_unity_analytics_event_properties_set_bool(properties, key, val);
+        }
+
+        public static void SetDate(IntPtr properties, string key, DateTime val)
+        {
+            appcenter_unity_analytics_event_properties_set_date(properties, key, NSDateHelper.DateTimeConvert(val));
+        }
+
+#region External
+
+        [DllImport("__Internal")]
+        private static extern IntPtr appcenter_unity_analytics_create_event_properties();
+
+        [DllImport("__Internal")]
+        private static extern void appcenter_unity_analytics_event_properties_set_string(IntPtr properties, string key, string val);
+
+        [DllImport("__Internal")]
+        private static extern void appcenter_unity_analytics_event_properties_set_long(IntPtr properties, string key, long val);
+
+        [DllImport("__Internal")]
+        private static extern void appcenter_unity_analytics_event_properties_set_double(IntPtr properties, string key, double val);
+
+        [DllImport("__Internal")]
+        private static extern void appcenter_unity_analytics_event_properties_set_bool(IntPtr properties, string key, bool val);
+
+        [DllImport("__Internal")]
+        private static extern void appcenter_unity_analytics_event_properties_set_date(IntPtr properties, string key, IntPtr val);
+#endregion
+    }
+}
+#endif