feat(Duolingo): Add `Disable ads` and `Enable debug menu` patch

[notjosh]

Following up from #3420, I found a reasonably reliable way to skip ads within the app without impacting any of the other features/limitations of free users based on some debug flags within the app.

While I was there, I noticed a way to unlock the debug menu in production builds. I've included that in this PR, but set the used = false so it's not available by default, as I don't think generally people should be touching those settings. But it might be useful for some folks looking to target certain language lessons, so I think it's worth keeping it as an option.