mainline:Replace serviceState.getDataRegState with getDataRegistrationState

Bug: 146637978
Test: - make RunSettingsRoboTests ROBOTEST_FILTER\
=PreferredNetworkModePreferenceControllerTest (PASS)
- make RunSettingsRoboTests ROBOTEST_FILTER\
=EnabledNetworkModePreferenceControllerTest (PASS)
Change-Id: I5a4a1a2b0dc5140257963651b69c0f427ef5ae93
Merged-In: I5a4a1a2b0dc5140257963651b69c0f427ef5ae93
3 files changed