Fix stealth mode for managed profiles

Stealth mode should not use effectiveUserId. Instead, it needs to use
the original userId.

Secondly, the pattern view should be setting stealth mode only after
the configuration is received (e.g. onFinishInflate is too early, and
the params are not passed in from its owner yet).

Fixes: 148382970

Test: 1) Make pattern visible for managed profile
      2) Reboot device
      3) Open work profile app - pattern is shown when entered
      4) Enter pattern
      5) Lock screen, unlock screen
      6) Open work profile app - pattern is shown when entered
      7) Repeat 1-6 with pattern set to not be visible. pattern should not
         be shown during 3) and 6)

Change-Id: I3e81cd31484fb0b7a99d554c3c274e8088df5ec7