Harden perf monitor to metro connection changes (#54022)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/54022

Perf monitor shows in a broken state if metro is started while the app is running. This change improves the tracing and monitor lifecycle around the metro connection events.

Before:
{F1982430185}

After:
{F1982430062}

Changelog: [Internal]

Reviewed By: shwanton

Differential Revision: D83714223

fbshipit-source-id: 76826122924baa1a80c04dcc5ff18bc756a8e816