Add memory leak tracking/debugging code to drm server

bug - 4099038

Change-Id: I6c048eaf3d7f34bc144b8daaa5fdef1ed474af66
diff --git a/drm/libdrmframework/include/DrmManagerService.h b/drm/libdrmframework/include/DrmManagerService.h
index d0a0db7..227496a 100644
--- a/drm/libdrmframework/include/DrmManagerService.h
+++ b/drm/libdrmframework/include/DrmManagerService.h
@@ -115,6 +115,8 @@
     ssize_t pread(int uniqueId, DecryptHandle* decryptHandle,
             void* buffer, ssize_t numBytes, off64_t offset);
 
+    virtual status_t dump(int fd, const Vector<String16>& args);
+
 private:
     DrmManager* mDrmManager;
 };