Update of DRM framework.

  - Change "void" type of return value to "int" for returning status.
  - Add some of overloaded Java APIs which accept database Uri as input.
  - Add asynchronous APIs
  - Add OnEventListener and OnErrorListener for asynchronous APIs
  - Disable debug log
  - Change decrypt() API to accept an optional buffer needed by some of DRM schemes

Changes are incorporated by Sony Corporation.

Change-Id: I414a165e22cc79be6ea7cd28041788aa2b6b8f7c
diff --git a/drm/libdrmframework/include/ReadWriteUtils.h b/drm/libdrmframework/include/ReadWriteUtils.h
index 022149e..529b342 100644
--- a/drm/libdrmframework/include/ReadWriteUtils.h
+++ b/drm/libdrmframework/include/ReadWriteUtils.h
@@ -47,6 +47,14 @@
      */
     static String8 readBytes(const String8& filePath);
     /**
+     * Reads the data into the given buffer from the file path provided
+     *
+     * @param[in] filePath Path of the file
+     * @param[out] buffer Data read from the file
+     * @return Length of the data read from the file
+     */
+    static int readBytes(const String8& filePath, char** buffer);
+    /**
      * Writes the data into the file path provided
      *
      * @param[in] filePath Path of the file