Remove project.android block from rn-tester's CLI config (#35197)

Summary:
The project.android block is unnecessary and contains a wrong path. Let's use the default path which is `./android`.

## Changelog

[Internal] - Remove project.android block from rn-tester's CLI config

Pull Request resolved: https://github.com/facebook/react-native/pull/35197

Test Plan: Tested locally + will wait for a CI run

Reviewed By: robhogan

Differential Revision: D41013193

Pulled By: cortinico

fbshipit-source-id: 5c76c9b571b23ad71a23a8f3f05a9acb4d6e20b9