Tests to verify importWrappedKey functionality.

- Build ASN.1 DER-encoded wrapped key material `SecureKeyWrapper`.
  Import the wrapped key material. Test should create DER-encoded
  wrapped key material and import the secure key successfully.
  Imported key should be used perform crypto operation successfully.

- Build ASN.1 DER-encoded wrapped key material `SecureKeyWrapper` with
  invalid AAD. Try to import the wrapped key material. Test should
  create DER-encoded wrapped key material. Test should fail to import
  the secure key with error code `VERIFICATION_FAILED`.

- Import wrapped AES key and use it for crypto operations. Test should
  import wrapped key and  user it for performing crypto operations
  successfully.

- Import a key wihtout WRAP_KEY purpose and try to use it as wrapping
  key while importing wrapped key. Test should fail to import wrapped
  key with an error code `INCOMPATIBLE_PURPOSE`.

- Try to import wrapped key using non-existing wrapping key in Android
  keystore. Test should fail to import wrapped key with an error code
  `KEY_NOT_FOUND`.

Bug: 194359114
Test: atest keystore2_client_test
Change-Id: Ic9ed03b6f945bd41c4873f97a84c1658c284e918
diff --git a/keystore2/tests/ffi_test_utils.hpp b/keystore2/tests/ffi_test_utils.hpp
index 7f5c3b2..b8c7c48 100644
--- a/keystore2/tests/ffi_test_utils.hpp
+++ b/keystore2/tests/ffi_test_utils.hpp
@@ -1,5 +1,11 @@
 #pragma once
 
 #include "rust/cxx.h"
+#include "ffi_test_utils.rs.h"
 
 bool validateCertChain(rust::Vec<rust::u8> cert_buf, uint32_t cert_len, bool strict_issuer_check);
+CxxResult createWrappedKey(rust::Vec<rust::u8> encrypted_secure_key,
+                              rust::Vec<rust::u8> encrypted_transport_key,
+                              rust::Vec<rust::u8> iv,
+                              rust::Vec<rust::u8> tag);
+CxxResult buildAsn1DerEncodedWrappedKeyDescription();