Steps to reproduce the problem:
1. Connect a USB camera to an Android device that has OTG support
2. Open Android Chrome and navigate to https://webrtc.github.io/samples/src/content/devices/input-output/

What is the expected behavior?
Able to see and select the USB Camera in the webpage

What went wrong?
The USB camera is not listed (i.e., not detected)

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 67.0.3396.87  Channel: stable
OS Version: 10.0
Flash Version: 

I haven't checked that if USB camera is supported by the standard Android API.  I've found conflicting stackoverflow answers https://stackoverflow.com/questions/50802007/communicating-with-the-usb-device-plugged-into-a-phone-for-instance-an-externa https://stackoverflow.com/questions/37828376/android-open-external-uvc-camera-instead-hardware-camera