Improve clients.matchAll(options)
- Embrace the recently added environment concept in enumerating
service worker clients.
- Add options.includeReserved and the relevant condition to filter the
matched clients.
- For an environment type client, it references the environment's
target browsing context's active document's UI properties to set the
visibilityState and the focused state.
Related commit: https://github.com/w3c/ServiceWorker/commit/8b483b091e0f0bae6b698cf05d915c2029748ae0
