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
diff --git a/radio/1.6/vts/functional/radio_response.cpp b/radio/1.6/vts/functional/radio_response.cpp
index 6e7b86f..b1e679b 100644
--- a/radio/1.6/vts/functional/radio_response.cpp
+++ b/radio/1.6/vts/functional/radio_response.cpp
@@ -1209,8 +1209,9 @@
 
 Return<void> RadioResponse_v1_6::getVoiceRegistrationStateResponse_1_6(
         const ::android::hardware::radio::V1_6::RadioResponseInfo& info,
-        const ::android::hardware::radio::V1_6::RegStateResult& /*regResponse*/) {
+        const ::android::hardware::radio::V1_6::RegStateResult& regResponse) {
     rspInfo = info;
+    voiceRegResp.regState = regResponse.regState;
     parent_v1_6.notify(info.serial);
     return Void();
 }