This app was mentioned in 3 comments, with an average of 2.67 upvotes
I use an Airconsole device and their IOS app from my phone/Ipad. They also have an android App. Not sure if it will work via mini USB though.
https://play.google.com/store/apps/details?id=nz.co.cloudstore.serialbot&hl=en
https://www.get-console.com/shop/en/28-airconsole-standard-20
I had an apple 30 pin to serial adapter for my ipad back when 30 pin was a thing, and a console app to go with it. I absolutely loved it, but I'm the kind of person who has no problems typing on a tablet screen. Much nicer than having to cart around a whole laptop bag, worry where to set a laptop, etc.
It looks like this is the Android equivalent of the iPad app I used to use. But it looks like you would need to use those airconsole cables. Googling around, it seems like Android does not allow you to use a simple usb-serial adapter, although you may be able to get around the restriction with a rooted device (but then I imagine you would need a compatible app too).
I bought the XL that works with Bluetooth or WiFi and has a 12 hour battery life. The only complaint I have is that the Bluetooth drivers were kind of a pain to install on a Windows laptop, but once it was installed, I had no problems. Works on Android or Apple.
Just download the following app and connect via Bluetooth.