Fix emergencyDial tests in VTS 1.6

 - Change to calling getVoiceRegistrationState_1_6() instead of getVoiceRegistrationState().
 - Fix incorrect voice registration state value

Bug: 187488263
Test: atest VtsHalRadioV1_6TargetTest
Change-Id: Iba5dcef20683bc6dca00b1c49899cfec5e1aac03
2 files changed