Changes to RIL to support IMS features for LTE.
Jake Hamby authored
- There is a new RIL request, RIL_REQUEST_ISIM_AUTHENTICATION, which is
  used to perform IMS AKA authentication using the algorithm on the ISIM
  application of the UICC. The challenge nonce and response are both encoded
  as Base64 strings.

Change-Id: I072b43d2b66b2013f8e58d3bd8251d75a453f167
fa8d584c