Changed format of interface class acitivity message.

For the sake of consistency, format of interface class activity message
is changed to "NNN IfaceClass <active/idle> <label>" and using single
response code for interface class activity.

Change-Id: I34dc5c37cc611d05172060b2a1e4ceac0a0f0588
diff --git a/NetlinkHandler.cpp b/NetlinkHandler.cpp
index 47f9496..6621a9a 100644
--- a/NetlinkHandler.cpp
+++ b/NetlinkHandler.cpp
@@ -139,11 +139,9 @@
                                                   bool isActive) {
     char msg[255];
 
-    snprintf(msg, sizeof(msg), "Iface %s %s", name, 
-             isActive ? "active" : "idle");
+    snprintf(msg, sizeof(msg), "IfaceClass %s %s",
+             isActive ? "active" : "idle", name);
     ALOGV("Broadcasting interface activity msg: %s", msg);
     mNm->getBroadcaster()->sendBroadcast(
-            isActive ? ResponseCode::InterfaceClassActive
-                     : ResponseCode::InterfaceClassIdle,
-            msg, false);
+        ResponseCode::InterfaceClassActivity, msg, false);
 }