Test Key Control Block with HDCP Version

This is a copy of the Widevine CL:
https://widevine-internal-review.googlesource.com/#/c/9480/

This change is part of OEMCrypto API version 9.

This CL adds verification that a key control block which requires a
specific version of HDCP can be loaded.  Also, if secure data path is
not set, it verifies that data is still decrypted.

This CL also adds test that verify DecryptCTR fails when the current
HDCP version is below that in the key control block.  The expected
error is OEMCrypto_ERROR_INSUFFICIENT_HDCP.  This error code is newly
introduced in this CL.

This is one attempt to clarify HDCP, as specified in b/13626021, and
is a slight modification from previous behavior for the mock and the
level 3 haystacked code.

This CL also tests the two valid verification codes "kctl"
and "kc09".

bug: 13626021
Change-Id: If380709d2306a3489470b29fb148a45b609b089d

libwvdrmengine/oemcrypto/mock/src/oemcrypto_engine_mock.h

@@ -248,6 +248,14 @@ class CryptoEngine {
                              size_t cipher_data_length, bool is_encrypted,
                              uint8_t* clear_data, BufferType buffer_type);
 
+  const OEMCrypto_HDCP_Capability current_hdcp_capability() {
+    return local_display_ ? 0xFF : current_hdcp_capability_;
+  }
+
+  const OEMCrypto_HDCP_Capability maximum_hdcp_capability() {
+    return maximum_hdcp_capability_;
+  }
+
  private:
 
   bool valid_;
@@ -256,6 +264,9 @@ class CryptoEngine {
   ActiveSessions sessions_;
   WvKeybox keybox_;
   wvcdm::Lock session_table_lock_;
+  OEMCrypto_HDCP_Capability current_hdcp_capability_;
+  OEMCrypto_HDCP_Capability maximum_hdcp_capability_;
+  bool local_display_;
 
   CORE_DISALLOW_COPY_AND_ASSIGN(CryptoEngine);
 };