[sample] change apns-full-conf.xml for Initial Attach.

Updated Country or Operator
US - T-Mobile
EU - Romania(CSM, ORG), France(SFR, ORG), Hungary(TMO), Croatia(TMO),
  Macedonia(TMO), Poland(TMO), Germany(TMO), Portugal(TMN, OPM, VDF, ZON),
  Netherlands(TMO), United Kingdom(EE), Greece(CSM, VDF), Spain(YGS, ORG),
  Italy(VDF), Czech(TMO), Austria(TMO)
KR - LG U+, SKT, KT

Bugs: 8733613
Change-Id: Id9b02f195901856e0eb949a02aeffba3c7f70065