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
(cherry picked from commit 816db80255de185aecd5ead895fffc73272aee0d)
Allow 'system' user to modify cpufreq control files

This is needed by new CPU Settings in CMParts

Change-Id: I0ec4e0b1705670034a433df549b2895985c476af
(cherry picked from commit 0106f670b638a806bdc1a09cedff4d9c922b89b7)
init: provide initial pemissions for ondemand governor

also set all governor permissions a bit late

Change-Id: I5c1445b31bcaf34a535efd7438fd612ada460ea2
(cherry picked from commit 1a0aaed6fb18d17e45fa73852cc557dc61877977)
rootdir: Set permissions for additional interactive sysfs nodes

Change-Id: I2dbcdcc199c5f75d08e8ebf41cd6768c7648e27b
(cherry picked from commit 64f46958ef2f7bd484db1009a85ee729d459a735)