Revert "Disable per-process app class to investigate"

Revert "Disable per-process app class to investigate (disabling CTS)"

Revert submission 16804724-disable-per-proc-app

Reason for revert: The revert has reached weekly. Now I'll revert it to see what change it made.
Reverted Changes:
I87f16857b:Disable per-process app class to investigate
I87f16857b:Disable per-process app class to investigate (disa...

Change-Id: Ib84035c7819acc347e0bbba8bfada66300778c63
Test: treehugger
Bug: 185177290