Add check_feature helper

Test: VtsAidlKeyMintTargetTest
Change-Id: I4a5b2a41172c15ae29efb5b177eb86cea5527b4e
diff --git a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
index 908eeab..fae9459 100644
--- a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
+++ b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
@@ -402,6 +402,7 @@
                         vector<uint8_t>* payload_value);
 void p256_pub_key(const vector<uint8_t>& coseKeyData, EVP_PKEY_Ptr* signingKey);
 void device_id_attestation_vsr_check(const ErrorCode& result);
+bool check_feature(const std::string& name);
 
 AuthorizationSet HwEnforcedAuthorizations(const vector<KeyCharacteristics>& key_characteristics);
 AuthorizationSet SwEnforcedAuthorizations(const vector<KeyCharacteristics>& key_characteristics);