Convert oemcrypto tests to BoringSSL

Merge from Widevine repo of http://go/wvgerrit/41620

bug: 62739406
test: unit tests
Change-Id: I72a64623912305965ff625a45041e2932a41f69b

libwvdrmengine/oemcrypto/test/oemcrypto_test.cpp

@@ -2964,7 +2964,7 @@ class OEMCryptoCastReceiverTest : public OEMCryptoLoadsCertificateAlternates {
     uint8_t hash[SHA_DIGEST_LENGTH];
     if (!SHA1(&message[0], message.size(), hash)) {
       dump_boringssl_error();
-      FAIL() << "openssl error creating SHA1 hash.";
+      FAIL() << "boringssl error creating SHA1 hash.";
     }
 
     // The application will prepend the digest info to the hash.