fascinatemtd: few changes for MMS

- remove some silly lower-than-the-default thresholds
- disable SMS split, and enable multipart SMS
- convert SMS to MMS after 7 message segments
- disable MMS read reports (doesn't work anyways)
- disable audio attachments (doesn't work on Vzw anyways)
- enable CellBroadcastReceiver for SMS alerts (extreme weather,
  CMAS alerts, etc) -unknown if functional, enabled on toro, it
  _should_ work

Change-Id: Iefce42ade8d2d725b8406b63cf17270cd5b2dfcc