Prevent potential stall in dns proxy.

Reflect the changes in ResponseCode.h to corresponding java file.

Change-Id: I6d536aa4942bb4bd9db5df97895467fcdb4786ca
diff --git a/services/java/com/android/server/NetworkManagementService.java b/services/java/com/android/server/NetworkManagementService.java
index 7bb7938..720b5fe 100644
--- a/services/java/com/android/server/NetworkManagementService.java
+++ b/services/java/com/android/server/NetworkManagementService.java
@@ -117,6 +117,7 @@
         public static final int InterfaceTxThrottleResult = 219;
         public static final int QuotaCounterResult        = 220;
         public static final int TetheringStatsResult      = 221;
+        public static final int DnsProxyQueryResult       = 222;
 
         public static final int InterfaceChange           = 600;
         public static final int BandwidthControl          = 601;