Pushes the flow rules also when devices are available (with DEVICE_AVAILABLLITY_CHANGED event).

Change-Id: Ia92df8c5da5828a9db2492e93a42bfd9a5136d25

@@ -265,11 +265,18 @@ public class PacketManager
         @Override
         public void event(DeviceEvent event) {
             Device device = event.subject();
-            if (event.type() == DeviceEvent.Type.DEVICE_ADDED) {
+            switch (event.type()) {
+                case DEVICE_ADDED:
+                case DEVICE_AVAILABILITY_CHANGED:
+                    if (deviceService.isAvailable(event.subject().id())) {
                         for (PacketRequest request : store.existingRequests()) {
                             pushRule(device, request);
                         }
                     }
+                    break;
+                default:
+                    break;
+            }
         }
     }