Fix call duration issue for conference

When calls are merged to a conference, the connectTime of
conference gets updated with some delay, resulting in the
wrong display of the conf call duration.
Fixed by updating the conf call time only after its
connectTime is updated.

CRs-Fixed: 1024100
Change-Id: Ide003b95aa4ed1a0340c42c568c1973ed84ce9ac
1 file changed