If that’s known to make it stand out then why not design an ESR for Android, whatever an ESR even is. Team Tor do have specialist in many areas after all.
The user agent does not contain the word Android. I’ve checked and I get
“User-Agent Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0”
Screen size wouldn’t/shouldn’t be an issue if using safest mode as discussed here How does Tor Android hide screen size? - #23 by iekbwalfahngtdpupz