Enable NavigationTiming on test2 w/sampling factor of 10000

With a high sampling factor like that, we likely won't be able to verify the
positive case on test2, but we can at least verify the negative case (not
included in sample). I'll do a follow-up change with default => true if
everything looks OK.

Change-Id: Iac66ead56477cfd3aa7d04e7b28c4d7c056da3fa
Merge "Enable NavigationTiming on test2 w/sampling factor of 10000"