Remove global variables from files
Change type to interface

Remove ts-ignores that are no longer needed because of tsconfig.web.json
Change ts-ignore to ts-expect-error for files outside react/features

Remove unnecessary ts-ignores
Remove unnecessary eslint-disable
Fix type errors
Change Dispatch type to IStore['dispatch']

* fix(audio-only) Do not enable video automatically when audio-only is disabled.

React Native doesn't define __filename nor __dirname so do it artisanally. In
addition, this helps with centralizing the configuration passed to loggers.

This refactors all handling of audio-only and last N to 2 features in preparation
for "low bandwidth mode".

The main motivation to do this is that lastN is a "global" setting so it helps
to have all processing for it in a single place.