Feasible to include external USB camera on recent Android?

[jcflack]

Recent Android (API 28?) should allow plug-and-play with USB UVC cameras (for example, borescopes), as documented here.

There was apparently a bug in Android 10 that was not fixed until the 2020-03-05 patch, where an app with CAMERA permission would be denied USB permission and fail. So that was a blocker, but apparently was fixed in March.

I wonder if it would be difficult now to let the app enumerate all of the available cameras and let the user select? Perhaps there is now enough support in Android to make this not too hard at the app level?

Until now, external cameras have required dedicated special apps. Presumably that will still be true on older Android versions; I assume they just won't show up in the Camera2 API as available cameras. (I don't know if special error handling might be needed in case of Android 10 without the 2020-03-05 update, in case the camera shows up in the API but can't be opened because of the permission bug.)