GitLab

Instead of accessing the device name pref directly in the settings mojo
implementation, use the local device data manager to get and set the
device name in addition to observing for device name changes.

Fixed: b/168138411
Change-Id: I610d653b640a36a5128ff66bb9e3c99b5aa7e538
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404715
Commit-Queue: Josh Nohle <nohle@chromium.org>
Reviewed-by: James Vecore <vecore@google.com>
Cr-Commit-Position: refs/heads/master@{#806314}