Add certificate information to offline licenses

[ Merge of http://go/wvgerrit/120508 ]

Offline licenses will now store the DRM certificate information. This
allows for expired certificates to be deleted and replaced without
losing the ability to use offline licenses.

Bug: 169740403
Test: WV unit/integration tests
      DeviceFilesTest.RetrieveLicenses
      DeviceFilesTest.StoreLicenses
Change-Id: Ic0de6328d32e0000d1b58c81019e6c2227278cc4

libwvdrmengine/cdm/core/src/cdm_session.cpp

@@ -1042,6 +1042,7 @@ CdmResponseType CdmSession::StoreLicense() {
 bool CdmSession::StoreLicense(DeviceFiles::LicenseState state,
                               int* error_detail) {
   DeviceFiles::ResponseType error_detail_alt = DeviceFiles::kNoError;
+  std::string drm_certificate;
   DeviceFiles::CdmLicenseData license_data{
       key_set_id_,
       state,
@@ -1056,7 +1057,9 @@ bool CdmSession::StoreLicense(DeviceFiles::LicenseState state,
       policy_engine_->GetGracePeriodEndTime(),
       app_parameters_,
       usage_entry_,
-      usage_entry_number_};
+      usage_entry_number_,
+      drm_certificate,
+      CryptoWrappedKey()};
 
   bool result = file_handle_->StoreLicense(license_data, &error_detail_alt);
   if (error_detail != nullptr) {