Add Carriers.SKIP_464XLAT and includes ApnSetting

Add the below flag as well and they are hidden now
 - SKIP464_XLAT_DEFAULT
 - SKIP464_XLAT_DISABLE
 - SKIP464_XLAT_ENABLE

Support new flag skip464xlat in ApnSetting

Bug: 69949375
Test: run TelephonyProviderTest

Change-Id: Ia85be92a41a7c1a0b8176718d17469880a0c42cb