Fix NRE on sending multipart texts.

Watch for deliveryIntents, parts, and sentIntents being null.

Change-Id: Ib9e55b59ef92d0f6057ec2e8c93dcb95d68a612d
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_frameworks_opt_telephony into cm-10.1