[Switch] Fix theme styleOverrides

[sparkpunk]

Fixes #25773

[mui-pr-bot]

Details of bundle changes

Generated by 🚫 dangerJS against 7c79e05

[eps1lon]

Could you add some context why we need this change? Ideally with a test or codesandbox illustrating the issue.

[mnajdova]

@eps1lon I've linked the issue that this PR is solving

[eps1lon]

@sparkpunk Could you run yarn prettier and commit the changes to get CI green?

[sparkpunk]

@eps1lon sure!

[mnajdova]

I apologize, I spend more time on this issue, seems like in the original codesandbox, the import to the ThemeProvider was not correct! We should import from @material-ui/core/styles, not @material-ui/core! This is easy to be overlooked :( https://codesandbox.io/s/pensive-bhaskara-i7r09?file=/src/theme.js

I am closing the issue and PR as it seems like everything is workingas expected, just by using the wrong provider, the incorrect context was changed.

[oliviertassinari]

While this theme provider issue was a false-positive, the double root, doesn't seem to be one:

We didn't use to forward the root directly (v4):

https://github.com/mui-org/material-ui/blob/d72862cf60b2ea314b5d9e3ed163a0f605e2eef2/packages/material-ui/src/Switch/Switch.js#L181

[mnajdova]

Looks like regression comming from #24693 the classes object propagated to the SwitchBase is incorrect.

[sparkpunk]

Thanks @mnajdova! Can't believe it was an import error. D'oh.