Made var as final.

app/src/main/java/com/vsoft/servicenow/ui/ChatActivity.java

@@ -62,8 +62,8 @@ public class ChatActivity extends HandleNotificationActivity implements OnDSList
     private static String NEW_MESSAGE_MESSAGE = "message";
     private static String IS_END_OF_INTENT = "is_end_of_intent";
 
-    private static String CLIENT_MESSAGE_KEY = "message";
-    private static String CLIENT_MAIL_KEY = "user_email";
+    private final static String CLIENT_MESSAGE_KEY = "message";
+    private final static String CLIENT_MAIL_KEY = "user_email";
 
     private static final int CHECK_CODE = 102;