Using Metadata Plugboards with Android tablet/phone (Onyx Boox (i86HDMI), Samsung S7)

Hi -
I am trying to set up /experiment with metadata plugboards, having just purchased an Onyx Boox i86 HDMI (Android tablet).
I would also like to use the plugboard for my Android phone (Samsung S7 Edge).

The plugboards do not provide an option for an "Android' device - but the Calibre user manual /help page for metadata plugboards indicates that there should be an entry for ANDROID devices. Am I missing something? Do I need to fix something to make this entry visible?

Ideally I'd like to obtain an entry so I can create metadata plugboards for the Onyx Boox and Samsung S7 Edge specifically - is that possible (or is it unnecessary if I can get the Android entry up and working)?

Thanks...
Persistence