You can configure Kiosk Mode to allow access to a custom WebView application or a browser shortcut that opens docs.google.com, but manual sign-out between users is still required.
Instead of strict Kiosk Mode, you could try using Android Enterprise Device Owner Mode, but I'm not sure if it would work.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
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