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Some of these prefs will be directly set in settings while other will be
managed by Nearby's local device manager. The settings added to the
allow list in settingsPrivate will be used directly in settings.

Change-Id: If16722bb8441776a7ff057e01532d19ac2bc7c0c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2289211
Commit-Queue: James Vecore <vecore@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Auto-Submit: James Vecore <vecore@google.com>
Cr-Commit-Position: refs/heads/master@{#786613}