Fix voicemail count issue.

Telephony checks voicemail count stored
in persist memory if SIM record returns
count zero.

Add code not to check voicemail count stored
in persist phone memory if card read success
and valid count is returned from card.

Change-Id: I69ea6e5087dd49a550bbb4b6f6721729e8cd7f15
CRs-Fixed: 655038
Change to return proper MNC in case of CSIM

As per spec C.S0065 section 5.2.2 MNC length in case of CSIM
IMSI is 2. So modify the code to return the MNC of proper length.

Change-Id: Id046b9ff3173c038fb2196e18625f077b1897beb
CRs-Fixed: 656508
Add ServiceStatus class for uniform capability handling

Add ServiceStatus class to support different access tech and
create uniform way of storing information for local/peer ability
and service status updates

Change-Id: I418c273e8b7f4cd5912e9b9cde85e9d83419cbf4
CRs-Fixed: 639446
IMS : Notifying CallModifyRequest Fail or sucess

1)Added new registrant to handle CallModifyRequest
  Fail or success.
2)Added Error codes.
3)This will ensure failed response to be propagated
  properly.

Change-Id: Ib5671d57e227e4e46bb548cb99703292eb6d4f6e
CRs-Fixed: 667503
IMS: Add API to set create time for a Connection.

setCreateTime() API is added to Connection class so that
create time can be transferred from IMS to CS connection
during SRVCC.

Change-Id: I20dc536171e3e91ac13c0897bf2121c56762785b
CRs-Fixed: 682041