Log Bad Keybox Token

Merge from widevine repo of http://go/wvgerrit/22664

This logs an error message when oemcrypto returns an error for
GetKeyData, and it updates the level3 to return a different error code
depending on which error was returned.

We have seen some provisioning errors in the field caused by GetToken
failing, but with no more information.   This should close that barn
door a little tighter.

Change-Id: Ie70980bbc3ac1353b76b668f12addf76c5e53cb8

libwvdrmengine/cdm/core/src/crypto_session.cpp

@@ -120,6 +120,7 @@ bool CryptoSession::GetTokenFromKeybox(std::string* token) {
     token->swap(temp_buffer);
     return true;
   }
+  LOGE("CryptoSession::GetTokenFromKeybox : error %d.", status);
   return false;
 }
 
@@ -141,6 +142,7 @@ bool CryptoSession::GetTokenFromOemCert(std::string* token) {
       retrying = true;
       continue;
     }
+    LOGE("CryptoSession::GetTokenFromOemCert : error %d.", status);
     return false;
   }
 }