Key derivation failure on key release

Signing and encryption keys are not correctly setup in OEMCrypto, when
an offline license is restored, before generating a key release message.
This results in key release failures. Playing back the license response
causes keys to be derived and allows the key release message to be constructed.

b/9016545

Merge of https://widevine-internal-review.googlesource.com/#/c/5682/
from the Widevine CDM repository

Change-Id: Ica9f13acc7c87e3125fa706f3a56e95b77a14a3c

libwvdrmengine/cdm/core/src/cdm_session.cpp

@@ -98,11 +98,10 @@ CdmResponseType CdmSession::RestoreOfflineSession(
     }
   }
 
-  if (license_type == kLicenseTypeOffline) {
-    if (!license_parser_.RestoreOfflineLicense(offline_key_request_,
-                                               offline_key_response_,
-                                               offline_key_renewal_response_))
-      return UNKNOWN_ERROR;
+  if (!license_parser_.RestoreOfflineLicense(offline_key_request_,
+                                             offline_key_response_,
+                                             offline_key_renewal_response_)) {
+    return UNKNOWN_ERROR;
   }
 
   license_received_ = true;