Update of DRM framework

 - Overload openDecryptSession() with uri parameter
   in order to accept URI of DRM content,
   Following API is added,
       DecryptHandle*openDecryptSession(const char* uri);.
 - Unify texisting three event types of processDrmInfo()
   so that caller of DRM framework does not have to handle many event types.
 - Let DrmManagerService call load/unload plugins API so that
   client of DRM framework does not have to manage plug-in load/unload.
 - Trivial fix in DrmManagerClient.java is also incorporated.

Changes are made by Sony Corporation.

Change-Id: If62b47fa0360718fdc943e6e6143671d7db26adc
diff --git a/include/drm/DrmInfoEvent.h b/include/drm/DrmInfoEvent.h
index c722bd3..7b409ff 100644
--- a/include/drm/DrmInfoEvent.h
+++ b/include/drm/DrmInfoEvent.h
@@ -59,8 +59,8 @@
     //! TYPE_NO_INTERNET_CONNECTION, when the Internet connection is missing and no attempt
     //! can be made to renew rights
     static const int TYPE_NO_INTERNET_CONNECTION = 2005;
-    //! TYPE_REGISTRATION_FAILED, when registration with server failed.
-    static const int TYPE_REGISTRATION_FAILED = 2006;
+    //! TYPE_PROCESS_DRM_INFO_FAILED, when failed to process DrmInfo.
+    static const int TYPE_PROCESS_DRM_INFO_FAILED = 2006;
 
 public:
     /**