Don't let profiles open the UserSettings overflow

Really, profiles aren't expected to open Settings at all. But if they
do somehow, the overflow shouldn't appear.

Bug: 352542820
Flag: EXEMPT bugfix
Test: Try to access the overflow of the work profile by launching its Settings in
adb shell am start --user 10 'com.android.settings/.Settings\$UserSettingsActivity'

Change-Id: I5e4c095cda3e19fa5c63c2c550a526f5da8ec5c1