Telephony: Fix issue in notifying disconnect completed

Currently, on Inactive state notifyDisconnectCompleted is
called with sendAll set to TRUE. This results in
DisconnectCompleted to all the contexts in the apnlist.
With multiple PDP context, there can be more than
1 apn in the apncontextlist.

With this patch, notifyDisconnectCompleted will be
called with sendAll set to false. This way,
NotifyDisconnectCompleted will be sent for only the
reported apnContext.

Change-Id: I2d2460dedbc6f38293aee14e05d18dca3a4ec428
Author: Jeevaka Badrappan <jeevaka.badrappan@intel.com>
Signed-off-by: Jeevaka Badrappan <jeevaka.badrappan@intel.com>
Signed-off-by: Arun Ravindran <arun.ravindran@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 44786