Device recovery is not possible but device loss can be tracked.

BUG=angleproject:2787

Change-Id: Ib94dd557b6b005a560b7a64275b176f7b1777211
Reviewed-on: https://chromium-review.googlesource.com/1194458Reviewed-by: Tobin Ehlis <tobine@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>