Telephony: Use new apn.sim.operator_numeric property

Use new property to filter apns. We need this new property
because icc.operator_numeric property is also used in cdma
and ApnSetting UI might display wrong set of apns if the
peroperty value used was set by RuimRecords.
CRs-Fixed: 362846

Change-Id: Ie740c9b3bb6a14621e19c55e4fa18c66bc0d7b0c