Make the Android unitTests compile (#34690)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/34690

While working on another part of the codebase I realized that
our Unit Tests are not compiling due to references to missing classes.
I'm cleaning them up + hooking the compileTest task inside the
`buildAll` task so at least they will be compiled on both CIs.

Changelog:
[Internal] [Changed] - Make the Android unitTests compile

Reviewed By: cipolleschi

Differential Revision: D39501945

fbshipit-source-id: 03d3e4872d6c738b8b85d1fef9302ac230e857d2