Add Property for Provisioning ID

Adds a property that allows applications to get the provisioning-unique serial
number.

Bug: 9175567

Also fixes some missing mutexes that were causing intermittent failures in
calls to OEMCrypto due to concurrency issues.

Bug: 9175583

Merge of https://widevine-internal-review.googlesource.com/#/c/5831/
from the Widevine CDM repository

Change-Id: I1d7e3ca9f3b06da345022f5f0d64e0c17a5cedca

libwvdrmengine/cdm/core/include/crypto_engine.h

@@ -6,6 +6,7 @@
 #define CDM_BASE_CRYPTO_ENGINE_H_
 
 #include <stdint.h>
+#include <map>
 #include <string>
 
 #include "crypto_session.h"
@@ -51,6 +52,7 @@ class CryptoEngine {
   SecurityLevel GetSecurityLevel();
   bool GetDeviceUniqueId(std::string* deviceId);
   bool GetSystemId(uint32_t* systemId);
+  bool GetProvisioningId(std::string* provisioningId);
 
 private: