[Notification] Remove build warnings

Change-Id: I0cb39e8e7895d4372322f37c3817df4c7b2da0bd

diff --git a/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationActiveStyle.cs b/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationActiveStyle.cs
old mode 100755 (executable)
new mode 100644 (file)
index 66a7163..841eb63
--- a/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationActiveStyle.cs
+++ b/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationActiveStyle.cs
@@ -16,6 +16,7 @@
 
 namespace Tizen.Applications.Notifications
 {
+    using System;
     using System.Collections.Generic;
 
     /// <summary>

diff --git a/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationProgress.cs b/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationProgress.cs
old mode 100755 (executable)
new mode 100644 (file)
index a124d42..e41724a
--- a/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationProgress.cs
+++ b/src/Tizen.Applications.Notification/Tizen.Applications.Notifications/NotificationProgress.cs
@@ -16,6 +16,8 @@
 
 namespace Tizen.Applications.Notifications
 {
+    using System;
+
     /// <summary>
     /// This class contains common properties and methods of notifications.
     /// </summary>