[IOT-1346] Enable network status monitoring for tcp network

[IOT-1346] Enable network status monitoring for tcp network

In case a connected wifi ap is changed, we have to close
the connected session previously. Otherwise we will use the
invalid session. If network status is down, we try to close
the session. and If network status is up, we create new socket
for listening.

Change-Id: I662df1a9a28d0ca629a8b23f83f94833787c5312
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12185
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: jihwan seo <jihwan.seo@samsung.com>
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/13097
Reviewed-by: Dave Thaler <dthaler@microsoft.com>