tree 197363bc62b6d955919354b89bdfbf3ae9b1b879
parent e39c7bd2113d342647c40011a6c6e62e31188de7
author jovanak <jovanak@google.com> 1572281789 -0700
committer jovanak <jovanak@google.com> 1573173590 -0800

DO NOT MERGE: Fix several issues with precreated users.

1. Prevent UserManager from destroying storage for precreated users.
2. Modify UMS.getUserIds to exclude precreated users.
3. Remove pre-created users if the system has upgraded.
4. Read permissions during conversion to a "real" user. Permissions should have been granted during the pre-creation. If we cannot read permissions, re-grant them for the user.

Fixes: 143464654
Fixes: 143463955
Test: Repeated subsequent boots; observing logs; boot systrace; applied OTA, verified user cleanup
Change-Id: I75b031105b2622a8a28e84cf2394e43ec93e4174