Revert "Show bouncer after user switch"

Revert submission 22301242-userswitch-bouncer

Reason for revert: seems to breaks flicker tests, investigated in b/277902000

Reverted changes: /q/submissionid:22301242-userswitch-bouncer

Change-Id: I13f401d1aa259b62cf1764f3613547c023bcb0bd
4 files changed