Meta key support

[Slion]

Is your feature request related to a problem? Please describe

I would love for us to find a way to support Meta key. Notably to enable things like keyboard shortcuts help #433 Related to #347

Describe the solution you'd like

I'm not sure what's the best solution. Could we use the context menu key? Probably not cause it is possibly usable as such. Could we use an HID GenericDesktop key such as SystemAppMenu for instance? Could we also have a button that acts as meta key in the title bar much like we have already a back button there?

Describe alternatives you've considered

No response

Please specify the version of Windows Subsystem for Android

2308.40000.3.0