Fix the length of the extracted BCC

After a successful extraction, the vector of BCC should be resized to
the correct value.

This CL picks the change from http://ag/19196496, which fixes the bcc
size for our internal extraction tool.

Test: build and run extraction tool
Bug: 237029566
Change-Id: I0c73861e363215486a93abebac84da2ce49d43a8

libwvdrmengine/factory_upload_tool/src/WidevineOemcryptoInterface.cpp

@@ -114,6 +114,7 @@ OEMCryptoResult OEMCryptoInterface::GetBcc(std::vector<uint8_t>& bcc) {
     result = GetBootCertificateChain(bcc.data(), &bcc_size,
                                      additional_signature.data(),
                                      &additional_signature_size);
+    if (result == OEMCrypto_SUCCESS) bcc.resize(bcc_size);
     LOGI("GetBootCertificateChain second attempt result %d", result);
   }