Ensure profile tabs are updated on profile locks/unlocks

mUserIds was being assigned a reference, and was getting updated prematurely making the condition on line 211 fail. This change initialize mUserIds to a new copy of the userIds when updating tabs.

Bug: 439780261
Test: manual verification on device
Flag: android.multiuser.enable_moving_content_into_private_space
Change-Id: I456f1c239e2081a23088dcd851618537f25291b5