Move over to the C++ Fstab class

Test: build and boot
Change-Id: Id3850c9c133f6644073a2439368501253a2a94a9
diff --git a/VoldUtil.cpp b/VoldUtil.cpp
index 4b980be..082f743 100644
--- a/VoldUtil.cpp
+++ b/VoldUtil.cpp
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-#include <linux/fs.h>
-#include <sys/ioctl.h>
+#include "VoldUtil.h"
 
-struct fstab* fstab_default;
+android::fs_mgr::Fstab fstab_default;