Add ISIM application support for LTE devices.

- Add methods to TelephonyManager to provide access to IMS records on
  the ISIM application of the UICC, as well as access to the ISIM
  AKA authentication algorithm.

- Add support for the new IMS methods to CDMALTEPhone, using the helper class
  ImsUiccRecords to load the IMS records from the ISIM. The same approach
  can be used to implement IMS support for UMTS/LTE devices.

- 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: I73367c7d9bc573d0d883d68adf09891de1319129