Use Tor for analytics and reporting

[tildelowengrimm]

Once we have Tor working, we should consider using it for analytics.

When a user opts in to report analytics, we should consider sending that info over Tor If Brave is connecting to an analytics service or proxy over Tor, we should probably configure that as an onion service on our end. Should we use a single onion service rather than a full hidden service? We should consider using something like Alec Muffett's Enterprise Onion Toolkit on the infrastructure side.

Tor — even a single onion service — is still probably slower than a regular connection. However, analytics are non-interactive, and shouldn't be time-sensitive on the order of seconds to minutes of connection difference.

[tildelowengrimm]

This is probably brave/brave-browser#804 now.