Add decrypt hash support

[ Merge of http://go/wvgerrit/68083 ]

Add ability to query decrypt hash support, set a hash computed over a frame
and retrieve the last error at a later point.

Bug: 34080802
Test: WV unit/integration tests. New tests added to cdm_engine_test,
      libwvdrmdrmplugin_hidl_test and request_license_test.

Change-Id: I7548c8798c873a6af3e1cfc0df57c117e1e474a6

libwvdrmengine/cdm/core/include/crypto_session.h

@@ -152,6 +152,14 @@ class CryptoSession {
   virtual bool GetResourceRatingTier(uint32_t* tier);
   virtual bool GetBuildInformation(std::string* info);
 
+  virtual uint32_t IsDecryptHashSupported();
+
+  virtual CdmResponseType SetDecryptHash(uint32_t frame_number,
+                                               const std::string& hash);
+
+  virtual CdmResponseType GetDecryptHashError(std::string* error_string);
+
+
   virtual CdmResponseType GenericEncrypt(const std::string& in_buffer,
                                          const std::string& key_id,
                                          const std::string& iv,