Mms: The priority, delivery report, validity period, and roaming attributes for SMS.

1.Support message priority when sending SMS.
  It can set SMS priority in message setting.
  There are four values for priority: normal, interactive,
  urgent and emergency.
2.Add SMS delivery report configuration for each subscription.
3.Add SMS validity period configuration for each subscription.
4.Remove all extra attributes when sending CDMA SMS during roaming

Change-Id: Iba68412a3a410568b9e9e738e3e8bc26ec6e0d64