Telephony(MSIM): Add prompt support for SMS

1) Add prompt option in SMS multi sim settings.
2) New iterface API to get SMS prompt is enabled or not.
3) Disply prompt while sending SMS, if user selects
   prompt mode in multi sim settings.
CRs-fixed: 474694

Change-Id: Iea9e8a4ea4f413316604a3d66ece624eab75ee26