Chrome on Android support via Web USB

[stylesuxx]

There is a polyfill by google for Web Serial via Web USB. this should allow to make the whole application work on mobile devices. at least on Android based ones.

• Swap custom version of polyfill to the official one, once reviewed and fixed
• Chromium fixed issue with claiming of devices

Devices confirmed to not work due to the Chromium issue:

• Samsung S6, Android 8
• Samsung Note 8, Android 9
• Moto G5 (custom ROM)

[stylesuxx]

This solution is good, but yields some problems:

1. The polyfill is not yet complete getInfo() needs to be merged and the callbacks need to be properly implemented. For now I am using my own fork which seems to be good enough
2. This is the bigger issue - there seems to be a problem with some Android devices were the Kernel might claim the device and Chrome for Android will not force claim it - resulting in the device being basically un-usable. This is bad, because it can't really be detected, the user has to try it to find out that it does not work.

Problem Nr. 2 exists on 1 of the 5 tested devices. For now we should not advertise this feature but rather collect as much data as possible to see on how many devices it actually breaks and if there might even be a solution.