apn: fix some data issues when using sprint operator numerics.

this fixes issues like
https://jira.cyanogenmod.org/browse/NIGHTLIES-404

requires:
http://review.cyanogenmod.org/#/c/79764/

Change-Id: I595788c3bf529640df16aaa75551bb55b4c0f036
Merge pull request #10 from CyanogenMod/cm-12.0

apn: fix some data issues when using sprint operator numerics.