Revert "Revert "Schematize vold system properties""

This reverts commit 49e81e0eeac13b1edcd4c8f51c48dafae6336d11.

Reason for revert: Fixed breakage

Change-Id: I414b753a218d9baf3d24530ff14df7644eb148e0
Merged-In: I5f75b15ab792329cdb9bf2dd2e4b42bccb6eb0f3
(cherry picked from commit 8346eb5ccc29f3ffe41132a06a4e7e17fb58ca19)
2 files changed