PortAutoForwardAction's opening commands not working

[andreamah]

Testing #183547

When I try to return PortAutoForwardAction.OpenPreview, PortAutoForwardAction.OpenBrowser, and PortAutoForwardAction.OpenBrowserOnce aren't working for me.

1. Create an extension as described in registerPortAttributesProvider({portRange:[5000,5000]}... doesn't match port 5000 #183846 and create a ports attribute provider.
2. Use the following to return one of the above actions:

	providePortAttributes(
		port: number,
		pid: number | undefined,
		commandLine: string | undefined,
		token: vscode.CancellationToken
	): vscode.ProviderResult<vscode.PortAttributes> {
			return new vscode.PortAttributes(
				<insert non-functioning action from above>
			);
	}

3. When running the command, we just get a notification. 🐛

I'm not sure whether this is happening because I'm in a devcontainer.

[andreamah]

Hmm, I'm still seeing this in an alpine devcontainer. The previews/browsers should open immediately upon detection, right?

[andreamah]

Verified using different verif steps than above.