Move the ConsentSyncBridge from namespace syncer to consent_auditor

Bug: None
Change-Id: I6c923ffd2c5631e21b6964774dd9588573236811
Reviewed-on: https://chromium-review.googlesource.com/c/1458204
Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Markus Heintz <markusheintz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#629986}
9 files changed