As requested in https://jira.cyanogenmod.org/browse/CYAN-5480
Also: restored Vodafone apn fix made in 74033 and accidentally reverted
in 73922
Change-Id: I426f5dbbe6fd671c26367ce5265d58e0e7dd9f1a
* patch set 1 to 7 doesn't fix the problem, it bruce forces the spn
list to ALL DEVICES.
* this change and http://review.cyanogenmod.org/#/c/57393/
will attack the problem at lowest level, customized it for speed
and memory.
* the best part is that it handles letters and exit the
function when it find a letter in the response from ril.
Change-Id: Ia63309acf38617e68b98ff1068463a942fa793df
