TeleService : Fix the network mode wrong issue for ssss

mButtonEnabledNetworks is used to replace the  mButtonPreferredNetworkMode.
But mButtonEnabledNetworks is added by third party for 4G/3G, which can not
fullfill the requirement of now. Use the mButtonEnabledNetworks back, and set
the right choice for it.

CRs-Fixed: 640954

Change-Id: Ia81da435effcde5752b76e83c6d1a9750f62c17b