IccSmsInterfaceManager: Don't intercept short-code premium messages

For both charging and potential timing factors on emergency and carrier
services, short codes should be delivered directly to the network.

Change-Id: If9d288048f9925573f8c5f2e51f0c2df789277bd
Fix NPE on sending multipart texts.

Watch for deliveryIntents, parts, and sentIntents being null.
Also do some code style cleanups.

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

Change-Id: I4abe2a2bd3e45bafde32de3a0c81576d742e4cee
Merge branch 'cm' into HEAD