Refactor SMS Middleware and SMS Send path.

Introduce a new Broadcast, ACTION_NEW_OUTGOING_SMS, that is similar to the existing call
equivalent ACTION_NEW_OUTGOING_CALL. This allows a receiver to rewrite the intent
or cancel it entirely.

This removes the need for injecting middleware.

Change-Id: I063288461161979f951932f32ade2cfbd72f8b73
Revert "PhoneProxy: when using v6 or greater ril make sure current phone type isnt GSM"

This reverts commit 5e0983ba3e96083da094d9706beadacce6b4e9c9.

Change-Id: I1d3727a5ac315309c1ce7aae4fa1d0662984432f