Fix NRE on sending multipart texts.

Watch for deliveryIntents, parts, and sentIntents being null.

This is based on http://review.cyanogenmod.org/#/c/46009/

Change-Id: Ia715e320d38f3fdbb10dd5621209bc432312cdb0
GsmSST: Disregard any invalid verbose values for timezones in NITZ requests

And assume anything resulting in "GMT" is invalid, since that's the
default value returned by libcore

Change-Id: I361650400e71976d8327ee3929947ca26a9eff57
Telephony: Decode SPN from RuimRecords properly

To address issues with incorrect encoding scheme programmed
in some commercial CSIM cards, the decoded SPN is checked to
have characters in printable ASCII range. If not, they are
decoded with ENCODING_GSM_7BIT_ALPHABET scheme.

Change-Id: I5ae06e0d3df5a3b5b080cc6e69a73daaff92cb10
HTCTegra3RIL: Add custom RIL for correct STK handling (1/2)

Change-Id: Ia12c85f43b5be0fe4e1cd3c3511490fd5cebe3af