Revert "Revert "Revert "Revert "Use our vold""""

This reverts commit 632e3ee741a142b09584e593bc9d7a510a98d696.
Revert "Revert "Use our system/core to avoid errors in build""

This reverts commit 259c00ebf048aae246f675482d69cbb5e25e0179.