Adds support for the `--devtools-server-address=<uri>` and `--devtools`
options.
Also fixes an issue where the VM service + DevTools connection
information was not printed to STDOUT for web devices.
Fixes https://github.com/flutter/flutter/issues/173617
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Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>