Revert "Fix MT call cannot be rejected for DSDS"

This reverts commit I3b600fe189b397ca94de63708eed8ebcfb1380be.
This change is causing regression in basic call end scenarios.

Change-Id: Ie21804dacfd81a0ba109af121b602a7e2867316e
CRs-Fixed: 1058473
1 file changed