Proper SMS support for KitKat.
Finish KitKat compatibility details.

1) The system does actually enforce having a BROADCAST_SMS
   permission on the SMS receiver. Break out the "delivered"
   parts of this into a separate Receiver, so the permission
   won't trip up GB devices.

2) The system does actually enforce having "quick response"
   intents.  Add a no-op for now.

3) Add a "make default" prompt.

4) Update settings to reflect what's going on in KitKat.