Revert "Make all permissions per-user."

This reverts commit 97a79bdb71ae03049c974a151db5071abfc8956d.

Reason for revert: Bug 168491570
Bug: 168491570

Change-Id: Icc1347e4e93b2499ea9b54dfabfa62a840e6d79e
(cherry picked from commit bf519fdd1107f5c3a899ca33639f49334971b4ca)
10 files changed