Revert "Improve multi user settings screen"

This reverts commit d19dc306.

Reason for revert: this CL made Settings the test cases called shadowUserManager.hasUserRestriction()
https://sponge.corp.google.com/target?show=FAILED&sortBy=STATUS&id=07150153-ccb7-4215-a9f8-eed31e44c66f&target=RunSettingsRoboTests1-test-output

Bug: 142798722

Change-Id: I3937a07ee35a472cadd6db8cd0177e08e63516a4