Add Support for RPLMN to Voice and Data RegState

-Define RegistrationFailCause as an enum
-Combine voice and data reg state into a single struct
-Define a safe-union for AN-specific registration info

Bug: 73629308
Test: make && make VtsHalRadioV1_5TargetTest
      && make cf_x86_64_phone-userdebug

Change-Id: I43df3cffd4c55f2c5df8eaf0235772e5930dced5
diff --git a/radio/1.5/vts/functional/radio_response.cpp b/radio/1.5/vts/functional/radio_response.cpp
index 644a262..d16833c 100644
--- a/radio/1.5/vts/functional/radio_response.cpp
+++ b/radio/1.5/vts/functional/radio_response.cpp
@@ -969,3 +969,19 @@
     parent_v1_5.notify(info.serial);
     return Void();
 }
+
+Return<void> RadioResponse_v1_5::getVoiceRegistrationStateResponse_1_5(
+        const RadioResponseInfo& info,
+        const ::android::hardware::radio::V1_5::RegStateResult& /*regResponse*/) {
+    rspInfo = info;
+    parent_v1_5.notify(info.serial);
+    return Void();
+}
+
+Return<void> RadioResponse_v1_5::getDataRegistrationStateResponse_1_5(
+        const RadioResponseInfo& info,
+        const ::android::hardware::radio::V1_5::RegStateResult& /*regResponse*/) {
+    rspInfo = info;
+    parent_v1_5.notify(info.serial);
+    return Void();
+}