Update wifi profile handling to store secure and hidden networks

Add new fields : "security" and "hidden" in wifi profile,
and manage them appropriately.

Open-webOS-DCO-1.0-Signed-off-by: Sapna Todwal <sapna.todwal@palm.com>

Change-Id: I4c0898118b2504a6373448089a261c04e2f0d0ec
Reviewed-on: http://g2g.palm.com/1194
Reviewed-by: Build Verification
Tested-by: Sapna Todwal <sapna.todwal@palm.com>
Reviewed-by: Keith Derrick <keith.derrick@palm.com>