Kingston pointed out that since there's a case where we don't show the RIL option we will need to know when it's shown (to count positive cases correctly) and also when we would have shown it (even when they're in the Finch-disabled group) for the counterfactual case.

Right now IIUC the RIL option is shown when:

finch_expt_enabled && CCT-version-of-Chrome-set-as-default

If we just log whether the current version of Chrome is set as default in a histogram when the CCT is opened as previously discussed that would both be interesting info in its own right and I think would suffice for a counterfactual condition.