It's hard to find estimates of android devices, but most reports I found indicate around 3 billion, and this makes us around 0,05%. I expected it to be low, but not like that...
See the calculator some guy made run doom or a barcode scanner at my job.
Android is a fairly good target development platform, it's still getting updates, apps built for older versions of android still work on newer versions, large active tallent pool both perfessionally and hobbyist, absolute metric fuck ton of tutorials. Yeah, if you're making a new product it isn't hard to just make it an android computer and throw am app on there that you make that does the thing.