nms: Actually allow smsRingtone to work.

  The change If02b398d5eb3520f173d7b71a11df2536a218bc1
  introduced the ability to allow notification to play
  a sound while in call. HOWEVER, it never worked since
  the notification record would be stripped of its effects.

TICKET: PAELLA-135
Change-Id: I736f027be91c321dcacd7bad974ed6f94bd1fc7e