Revert "Revert "Schematize vold system properties""

This reverts commit 49e81e0eeac13b1edcd4c8f51c48dafae6336d11.

Reason for revert: Fixed breakage

Change-Id: I414b753a218d9baf3d24530ff14df7644eb148e0
Merged-In: Id2a696c621015d46015d5de0e7aef987e9e01b54
2 files changed