WearOS: Show barcode value on barcode screen

[TheLastProject]

In #3302, the barcode was removed due to Google being very very picky that no element may even be partially off-screen on WearOS. See #3284 for more info. It would be nice to get this element back. The UI would need some redesigning to always make sure all elements properly fit.

FYI @blacklight

[TheLastProject]

@blacklight Given #3284 is a closed MR, let's continue the discussion here.

Regarding your post on #3284 (comment):

I'm ok for the "Hide barcode value" hack, but I think there's still a lot of value in also showing the code value (at least for my geek/inspector use-case).

I agree there's a lot of value in it, also just to read the number to a cashier. I am unhappy this had to be removed.

In an idea world I would envision some logic to fit the text depending on its length, formatter used (we could also build our own to have more control) and screen size information, but it sounds like overkill in practice.

I tried my hand at this for over an hour and couldn't get the screen to behave, yeah.

@TheLastProject perhaps a "View Value" action button that opens the text value of the code in a separate view, treated as standard scrollable text view so it doesn't mess with fullscreen formatting?

Using an EdgeButton seems like the perfect way to implement this. We can name it something like "About card" and just show all the general stuff: barcode value, note, expiry, etc. in a simple scrollable view.