Fix NO_CONNECTIVITY flag in some cases.

Airplane mode seemed to hit this bug.

bug:2498268
Change-Id: I5af9266fbbad3e2323d30d7471058f0f4ec3f544

services/java/com/android/server/ConnectivityService.java

@@ -995,6 +995,8 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                     }
                 } else {
                     newNet.reconnect();
+                    newNet = null; // not officially avail..  try anyway, but
+                                   // report no failover
                 }
             }
         }