app center；增加發送ping的秒

Assets/AppCenter/Plugins/Android/Utility/JavaStringMapHelper.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+#if UNITY_ANDROID
+using System;
+using System.Linq;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Microsoft.AppCenter.Unity.Internal.Utility
+{
+    public class JavaStringMapHelper
+    {
+        public static Dictionary<string, string> ConvertFromJava(AndroidJavaObject map)
+        {
+            var keySet = map.Call<AndroidJavaObject>("keySet");
+            var keyArray = keySet.Call<AndroidJavaObject>("toArray");
+            string[] keys = AndroidJNIHelper.ConvertFromJNIArray<string[]>(keyArray.GetRawObject());
+            var dictionary = new Dictionary<string, string>();
+            foreach (var key in keys)
+            {
+                var val = map.Call<string>("get", key);
+                dictionary[key] = val;
+            }
+            return dictionary;
+        }
+
+        public static AndroidJavaObject ConvertToJava(IDictionary<string, string> properties)
+        {
+            if (properties == null)
+            {
+                return null;
+            }
+            string[] keys = properties.Keys.ToArray();
+            string[] values = properties.Values.ToArray();
+            int count = properties.Count;
+            var javaMap = new AndroidJavaObject("java.util.HashMap");
+            for (int i = 0; i < count; ++i)
+            {
+                javaMap.Call<AndroidJavaObject>("put", keys[i], values[i]);
+            }
+            return javaMap;
+        }
+    }
+}
+#endif