Currently connection manager code flow does not send connect info
diag event, to achieve this update csr connect info api in such a
way that connectoin manager code flow can also use it to send
connect info diag event.
Also update the function csr_get_sta_cxn_info to get the required
information from vdev instead of roam profile.
Change-Id: Ib9bb3f06052416f6edb168767dbe2a4c80fae765
CRs-Fixed: 2862244
500b5daf3f