app center；增加發送ping的秒

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

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+#if UNITY_ANDROID
+using UnityEngine;
+
+namespace Microsoft.AppCenter.Unity.Internal.Utility
+{
+    public class JavaNumberHelper
+    {
+        public static AndroidJavaObject Convert(int val)
+        {
+            AndroidJavaObject javaInteger = new AndroidJavaObject("java.lang.Integer", val);
+            return javaInteger;
+        }
+
+        public static AndroidJavaObject Convert(long val)
+        {
+            AndroidJavaObject javaLong = new AndroidJavaObject("java.lang.Long", val);
+            return javaLong;
+        }
+
+        public static AndroidJavaObject Convert(float val)
+        {
+            AndroidJavaObject javaFloat = new AndroidJavaObject("java.lang.Float", val);
+            return javaFloat;
+        }
+
+        public static AndroidJavaObject Convert(double val)
+        {
+            AndroidJavaObject javaDouble = new AndroidJavaObject("java.lang.Double", val);
+            return javaDouble;
+        }
+
+        //TODO how to support decimal?
+    }
+}
+#endif