Improve Error Reporting

Adds more meaningful error reporting where possible to the DrmEngine.  Adds
translation of CDM and OEMCrypto errors to Android errors.

Bug: 8621516
Change-Id: Ibab8a8711c3929ed72870ec7e138cd42358d9fb3

libwvdrmengine/mediadrm/include/WVDrmPlugin.h

@@ -5,6 +5,7 @@
 #ifndef WV_DRM_PLUGIN_H_
 #define WV_DRM_PLUGIN_H_
 
+#include <stdint.h>
 #include <map>
 
 #include "media/drm/DrmAPI.h"
@@ -159,6 +160,8 @@ class WVDrmPlugin : public android::DrmPlugin,
   WvContentDecryptionModule* mCDM;
   WVGenericCryptoInterface* mCrypto;
   map<CdmSessionId, CryptoSession> mCryptoSessions;
+
+  static status_t mapOEMCryptoResult(OEMCryptoResult res);
 };
 
 } // namespace wvdrm

libwvdrmengine/mediadrm/include/WVGenericCryptoInterface.h

@@ -5,6 +5,8 @@
 #ifndef WV_GENERIC_CRYPTO_INTERFACE_H_
 #define WV_GENERIC_CRYPTO_INTERFACE_H_
 
+#include <stdint.h>
+
 #include "OEMCryptoCENC.h"
 
 namespace wvdrm {