Sentry has a complex set of options and their defaults often change so begin to lock down our expectations and assert them. Functionally this patch also disables health pings, ANRs and caught-exception handling. We can revisit re-enabling them in the future when we have been tie in to Fenix settings and more test coverage. These changes are also applied to Focus via the shared lib-crash code. This also removes the Sentry performance monitor ContentProvider from startup since the feature was already disabled for us. Differential Revision: https://phabricator.services.mozilla.com/D325521