Game developers now have the option to upload game distributives for Android-based operating systems to Steam.
This information was reported to App2Top.ru by Andrey Postnikov, Senior Business Developer at Nutaku. He also provided screenshots that confirm the new feature.
It's unclear whether this feature works and if it's actually possible to upload an apk file to Steam, as users currently cannot select Android as a filter or tag.
It's possible that the option was added prematurely. There is no information about the launch of such a feature in Steamworks Development.