Gray out admin-disabled screenlock option properly

Fix an issue where some sceenlock options are disabled
by admins but not showing up as grayed out.

Bug: 288081292
Flag: EXEMPT bug fix
Test: manually with `am start  -a android.app.action.SET_NEW_PASSWORD
  --ez isSetupFlow true --ei android.app.extra.PASSWORD_COMPLEXITY 327680`
Change-Id: I4aab61a052bc2c5146f44d0bfcd8153e3f2cee92