Fix unnecessary copy initialization warnings

Bug: 30413862
Test: build with WITH_TIDY=1
Change-Id: I3002c0f68466f00f9b4e50c5fb14961430c9e625
diff --git a/keystore/key_store_service.cpp b/keystore/key_store_service.cpp
index 2a75c45..0a6d406 100644
--- a/keystore/key_store_service.cpp
+++ b/keystore/key_store_service.cpp
@@ -1584,7 +1584,7 @@
 }
 
 int isDeviceIdAttestationRequested(const KeymasterArguments& params) {
-    const hardware::hidl_vec<KeyParameter> paramsVec = params.getParameters();
+    const hardware::hidl_vec<KeyParameter>& paramsVec = params.getParameters();
     int result = 0;
     for (size_t i = 0; i < paramsVec.size(); ++i) {
         switch (paramsVec[i].tag) {