OEMCrypto v16.1

Merge of http://go/wvgerrit/93404

This CL updates the Widevine CDM to support OEMCrypto v16.1

Test: Tested in 16.2 CL
Bug: 141247171
Change-Id: I69bd993500f6fb63bf6010c8b0250dc7acc3d71b

libwvdrmengine/cdm/core/include/certificate_provisioning.h

@@ -48,6 +48,8 @@ class CertificateProvisioning {
       FileSystem* file_system, const CdmProvisioningResponse& response,
       std::string* cert, std::string* wrapped_key);
 
+  bool supports_core_messages() const { return supports_core_messages_; }
+
   // Helper methods
 
   // Extract serial number and system ID from a DRM Device certificate.
@@ -73,6 +75,13 @@ class CertificateProvisioning {
   CdmCertificateType cert_type_;
   std::unique_ptr<ServiceCertificate> service_certificate_;
 
+  // Indicates whether OEMCrypto supports core messages, and whether the
+  // CDM should expect a core message in the response.  This is primarly
+  // used to distinguish between v16+ OEMCrypto or and earlier version.
+  // Assume core messages are supported, and check if OEMCrypto populates
+  // the core message field when calling PrepAndSignProvisioningRequest().
+  bool supports_core_messages_ = true;
+
   CORE_DISALLOW_COPY_AND_ASSIGN(CertificateProvisioning);
 };