Scope down Network panel features for React Native

[huntie]

Summary

Disables and scopes down various parts of the Network panel UI when Root.Runtime.ExperimentName.REACT_NATIVE_SPECIFIC_UI is set.

Removes:

• Web-only concepts
  • Filters: Hide extension URLs, Blocked request cookies, 3rd party requests
  • Resource category filters: Document, Stylesheet, Font, Manifest, Websocket, Wasm
• Features we don't plan to implement in our first pass
  • Network conditions (throttling)
  • Screenshot capture

Additionally, opts into the NETWORK_PANEL_FILTER_BAR_REDESIGN experiment for our react_fusebox.ts entry point — aiming to minimise code forks under maintenance.

Test plan

Before

After

ℹ️ NETWORK_PANEL_FILTER_BAR_REDESIGN is enabled, moving the filter options into two dropdowns.
✅ Features hidden
✅ Resource categories limited

---

• This change maintains backwards compatibility with previous Local Storage data (if modifying settings, experiments, or other persisted client state).

Upstreaming plan

• This commit should be sent as a patch to the upstream devtools-frontend repo. I've reviewed the contribution guide.
• This commit is React Native-specific and cannot be upstreamed.