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

Change-Id: Ic6e8afd76cb0af88612cf5a6cd34a0c7f50759c4

src/com/android/settings/users/MultiUserSwitchBarController.java

@@ -57,10 +57,11 @@ public class MultiUserSwitchBarController implements SwitchWidgetController.OnSw
             mSwitchBar.setDisabledByAdmin(RestrictedLockUtilsInternal
                     .checkIfRestrictionEnforced(mContext, UserManager.DISALLOW_USER_SWITCH,
                             UserHandle.myUserId()));
+
         } else if (mUserCapabilities.mDisallowAddUser) {
-            onSwitchToggled(false);
             mSwitchBar.setDisabledByAdmin(RestrictedLockUtilsInternal
-                    .checkIfAddUserDisallowed(mContext, UserHandle.myUserId()));
+                    .checkIfRestrictionEnforced(mContext, UserManager.DISALLOW_ADD_USER,
+                            UserHandle.myUserId()));
         } else {
             mSwitchBar.setEnabled(!mUserCapabilities.mDisallowSwitchUser
                     && !mUserCapabilities.mIsGuest && mUserCapabilities.isAdmin());