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

This reverts commit bd8f43ca649674429793a9952b7407753c177490.
Revert "Revert "Revert "Revert "Use our system/core to avoid errors in build""""

This reverts commit 2dc353562969b4d65d94d4426cb12b48338c6397.