Revert "Disable multiuser toggle om COPE device and add explanat..."

Revert submission 25262217-fix_mu_for_cope

Reason for revert: This issue requires a different approach to the solution.

Reverted changes: /q/submissionid:25262217-fix_mu_for_cope
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:1a81a9e9421610d7f7a02639874c08ff8063ed77)
Merged-In: Ic6e8afd76cb0af88612cf5a6cd34a0c7f50759c4
Change-Id: Ic6e8afd76cb0af88612cf5a6cd34a0c7f50759c4