Improve Network trace event field coverage (#53840)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/53840

After this diff, successful network events are displayed as fully hydrated timespans in the Performance panel network track, with all metadata needed to usefully populate the UI.

**Changes**

Adds:
- `"ResourceFinish"`: `encodedDataLength`, `decodedBodyLength`
- `"ResourceReceiveResponse"`: Populates `data.timing` members, which enables *"Request sent and waiting"* to be rendered correctly in the timeline.

Removes:

- `"ResourceWillSendRequest"` events — very rarely emitted by Chrome and are extraneous for our use case.

Changelog: [Internal]

Reviewed By: hoxyq

Differential Revision: D82636798

fbshipit-source-id: a4b0f0671b97aaadc279ac56d39fee0c95d4ddc7