[Settings] hide preferred network mode UI

Hide preferred network mode UI no matter home, roaming or no service
when KEY_HIDE_PREFERRED_NETWORK_TYPE_BOOL been enabled.

Bug: 137681413
Test: atest PreferredNetworkModePreferenceControllerTest
      atest EnabledNetworkModePreferenceControllerTest
      Manual with AT&T SIM card in out of servce and in service

Change-Id: Ia0d1333c6cbae3a3717c8db6b77fbb9ea8cec968