Currently the flutter/plugins analysis_options.yaml is essentially just https://github.com/google/pedantic/blob/master/lib/analysis_options.1.8.0.yaml. Ideally we should be using all (or at the very least most) of the same options as flutter/flutter.

We'd need to figure out how to introduce these it a way that wouldn't be incredibly disruptive to all future incremental changes. Likely turning them on one by one in conjunction with repo-wide fixes for everything they turn up (one PR per lint option if there are widespread changes).