Cleanup/Fix APN data fields

*Remove unsupported fields:
  inactivity_timer, state, spn, extraid, preferapp
*Correct fields:
  authenticationtype="PAP" --> authtype="1"
  authenticationtype="CHAP" --> authtype="2"
  mmsx="http://mms.celcom.net.my" --> mmsc="http://mms.celcom.net.my"
  mmspor="3128" --> mmsport="3128"
  pass="CLAROWEB" --> password="CLAROWEB"
*Cleanup whitespace:
  " = " --> "="
  "  " --> " "

Reference: packages/providers/TelephonyProvider
  src/com/android/providers/telephony/TelephonyProvider.java

Change-Id: Ie18daf638882c58244bbbb6ea9615e6a9fd9dc70

Conflicts:
	prebuilt/common/etc/apns-conf.xml