Skip MetricsReportingEnabled test
As code for MetricsReportingEnabled checkbox has been refactored not to use pref in HTML, it is not possibly to test the policy enforcement with the current test (codereview.chromium.org/
506663003).
Therefore we skip MetricsReportingEnabled test to have a quick solution for failing bots, until a new test will be created.
Also, just because I was touching this file I fixed OFFICIAL_BUILD to be GOOGLE_CHROME_BUILD(discussed in crbug.com/399462).
BUG=414945
Review URL: https://codereview.chromium.org/
586453002
Cr-Commit-Position: refs/heads/master@{#295720}