prebuilt: apns-conf-cdma.xml: Fix Sprint APNs and clean up APNs for test SIM cards

- Add back and fix Sprint APN for 1x/HRPD. Corrects MMS settings and gives a
suitable APN for DcTracker to use for HRPD/EvDo.
- Remove All test SIM APNs. Since no one is running around with a test SIM and
its useless to have a bunch of APNs sharing the same MCC MNC pair.

Change-Id: I1ccbed9b3cdd456e97d205d70bf283785122de8c
Merge "prebuilt: apns-conf-cdma.xml: Fix Sprint APNs and clean up APNs for test SIM cards" into cm-10.2
vendor/cm: update CONTRIBUTORS

add Michael Limb (something15525) for Google Galaxy Nexus (toroplus)
add David Hays (flyhalf205) for Verizon HTC One (m7vzw)

Change-Id: I8fac4f71ee1c641de97eb1a43653097637924ecb
Merge branch 'cm-10.2' of https://github.com/CyanogenMod/android_vendor_cm into cm-10.2