VTS testcases for HAL API setSimSlotMapping

To accomodate MEP, we have updated the setSimSlotMapping API in the HAL,
Writing the tescases to check functionality of the same.

Test: atest VtsHalRadioTargetTest
Bug: 217665559
Change-Id: Idbff19db2e536d3c2f7b80afbbf244575d8247d0
diff --git a/radio/aidl/vts/radio_config_response.cpp b/radio/aidl/vts/radio_config_response.cpp
index 8d81605..7384f87 100644
--- a/radio/aidl/vts/radio_config_response.cpp
+++ b/radio/aidl/vts/radio_config_response.cpp
@@ -19,8 +19,9 @@
 RadioConfigResponse::RadioConfigResponse(RadioServiceTest& parent) : parent_config(parent) {}
 
 ndk::ScopedAStatus RadioConfigResponse::getSimSlotsStatusResponse(
-        const RadioResponseInfo& info, const std::vector<SimSlotStatus>& /* slotStatus */) {
+        const RadioResponseInfo& info, const std::vector<SimSlotStatus>& slotStatus) {
     rspInfo = info;
+    simSlotStatus = slotStatus;
     parent_config.notify(info.serial);
     return ndk::ScopedAStatus::ok();
 }