Telephony: Update Icons to Kitkat

* These are old icons from Jellybean.  This is KitKat!!!

Change-Id: I6f1fbd991d097b53139016da2812c6a6409fb82c
Fix NT_MODE case statements

These changes are necessary because of a RIL bug. Network Mode 7 is
LTE/CDMA for Verizon, which maps to the const NT_MODE_GLOBAL. This
allows the network mode to be changed.

Change-Id: I7dae0684e475f3ffd33f767088a6de13c36caaa7