wifi(implementation): Fix unit test failures

ag/6722341 caused some unit test failures. Fixing them.

Bug: 127715974
Test: ./data/android.hardware.wifi@1.0-service-tests
Change-Id: Ib504cf55b9990dba081eb1b07bc32508e09ad0a6
diff --git a/wifi/1.3/default/wifi_legacy_hal.h b/wifi/1.3/default/wifi_legacy_hal.h
index 70a919f..4d6beb3 100644
--- a/wifi/1.3/default/wifi_legacy_hal.h
+++ b/wifi/1.3/default/wifi_legacy_hal.h
@@ -184,9 +184,9 @@
     // Checks if legacy HAL has successfully started
     bool isStarted();
     // Wrappers for all the functions in the legacy HAL function table.
-    std::pair<wifi_error, std::string> getDriverVersion(
+    virtual std::pair<wifi_error, std::string> getDriverVersion(
         const std::string& iface_name);
-    std::pair<wifi_error, std::string> getFirmwareVersion(
+    virtual std::pair<wifi_error, std::string> getFirmwareVersion(
         const std::string& iface_name);
     std::pair<wifi_error, std::vector<uint8_t>> requestDriverMemoryDump(
         const std::string& iface_name);