Fix configured network status

For a connected network, keep status as CURRENT. For a network,
that is disconnected it should be ENABLED. A disabled network
will have the status as DISABLED

Also, add a unit test to ensure there is only one CURRENT network
that is connected

Change-Id: Iaa4a7124a0c372a8f6df3d846ae8c15d9b29cf13
3 files changed