libril: update unsol htc responses and add support for m7.

Change-Id: Ibc17332b40c465f89a85fa078604a690b588f6f2
msm8960-common: libril: clarify naming of VOICE_RADIO_TECH_CHANGED

* For some reason there are two of these named very similarly to each
  other.

Change-Id: I1b8869395176852e675485edae714bec616f35d1
Merge branch 'cm' into HEAD