GH-2229: Ghostery Browser New Telemetry

[benstrumeyer]

• Have you followed the guidelines in CONTRIBUTING.md?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you added an explanation of what your changes do?
• Does your submission pass tests?
• Did you lint your code prior to submission?

• Set metrics url product_id=gd if on ghostery browser, gbe otherwise

Ticket: https://ghostery.atlassian.net/browse/GH-2229