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
Merge changes I36165040,Ia715e320 into jb4.3

* changes:
  GsmSST: Disregard any invalid verbose values for timezones in NITZ requests
  Fix NRE on sending multipart texts.