GitLab

The RecordTotalCount metric is incorrectly logged as 0 during OOBE
since the networks have not had a chance to merge.

This CL
1. Adds a pref to avoid the incorrect log of 0 networks during
OOBE.
2. Adds a Teardown in the unittests to temporarily fix flaky tests.

Bug: 1135854
Change-Id: I03328caae2753b0331a9c5ed43d7b79de64dac44
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2519327Reviewed-by: Jon Mann <jonmann@chromium.org>
Commit-Queue: Claude van der Merwe <cvandermerwe@google.com>
Cr-Commit-Position: refs/heads/master@{#825827}