Revert "Revert "Remove ComputerTracker and fix consistency in PackageManagerService""

This reverts commit 35ef88f4cc5bdfee4a8bc1c3eb8b9f21823fa7db.

Reason for revert: re-introduce change after disabling test in
Ia4303f6ba0160c24ac8949c359dfe3e28a544cc6

Change-Id: I14402335736559c4997439425d2ab49ac172d9ca
42 files changed