GitLab

This CL moves ScreenlockBridge to components/proximity_auth.

It also moves the usage of profile out of ScreenLockBridge as this
dependency is forbidden in //components.

TBR=rogerta,antrim,rdevlin.cronin,tengs

BUG=479670

Review URL: https://codereview.chromium.org/1096293003

Cr-Commit-Position: refs/heads/master@{#327049}