Add ROCKROBO_S4 to xiaomi_miio vaccum models

[OGKevin]

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Additional information

• This PR fixes or closes issue: fixes Error while setting up xiaomi_miio platform for vacuum #58550
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Hey there @rytilahti, @syssi, @starkillerOG, @bieniu, mind taking a look at this pull request as it has been labeled with an integration (xiaomi_miio) you are listed as a code owner for? Thanks!
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[bdraco]

Is there something holding up the pythonmiio release with these constants?

[OGKevin]

1. its not merged yet: Add S4 to the list of supported models. rytilahti/python-miio#1169
2. There will be no release soon: Xiaomi Miio Vacuum: Could not determine how to parse state value of type <class 'NoneType'> #57474 (comment)

[bdraco]

Thanks for the backstory

[frenck]

We agree on merging the S5Max too in this way. I think we should prevent end-user issues/reports and merge this one in now (and get it into beta).

The upstream change is pending, so that is good 👍