cm: World Phone support

* combine apns
* leave cdma/gsm files intact but empty until the calls
* are removed from devices cm.mk

Change-Id: I0686ef4ee1fe9b34ac9beaaa2bd43555234f4f6d
apns: add 8ta APN

Add South Africa newest cellphone provider 8ta.com/telkommobile.co.za
APN values

Change-Id: If2f0c593c41c9c9d8c57d14602ee7304ba735fb0
Don't assume phones are the only clients for the telephony configuration bits

Data-enabled tablets need love, too

Change-Id: I239823f198260d0f045c6e7305cf04082a8ef1e9