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/src/cdm_session.cpp

@@ -1068,6 +1068,16 @@ CdmResponseType CdmSession::GenericVerify(const std::string& message,
   return sts;
 }
 
+CdmResponseType CdmSession::SetDecryptHash(uint32_t frame_number,
+                                           const std::string& hash) {
+  return crypto_session_->SetDecryptHash(frame_number, hash);
+}
+
+CdmResponseType CdmSession::GetDecryptHashError(
+    std::string* error_string) {
+  return crypto_session_->GetDecryptHashError(error_string);
+}
+
 bool CdmSession::UpdateUsageInfo() {
   std::string app_id;
   GetApplicationId(&app_id);