Fix Dds switch issue

During data call setup in progress on Dds sub, if Dds is switched,
data disconnected indication is not received immediately,
due to which PS attach is delayed.
Fix is to notify data disconnect indication if data call is not in
connected state on Dds sub.

Change-Id: I251cb6b33f8c52d918d60c3698175e49779cbecf
CRs-Fixed: 806698