Add standardized support for device metadata

[supernintendo]

@DanielDent says:

I'd really like to see standardized support for sending device state information back to the server from the client. Examples I have in mind: app bundle id, version name, version code, device type, language/locale info, OS version, SDK version, install UUID, etc. Likewise with information about permission state (e.g. asked, unasked, granted, denied) for the various permissions an app might need.

Here are some examples of handling of these types of issues with the NativeScript project:

https://github.com/nativescript-community/perms
https://github.com/EddyVerbruggen/nativescript-appversion
https://docs.nativescript.org/api-reference/interfaces/idevice
https://github.com/NativeScript/NativeScript/blob/ee701db13/packages/core/platform/index.d.ts#L121
Sometimes a new capability or a bugfix requires a new build of the mobile app, and being able to serve different application variations based on the client's version/capabilities/state can be extremely helpful/essential.

These are great ideas, just a bit larger in scope than what I think the original issue asked for. I've moved it here to consider as a general approach to passing device-specific state across any LiveView Native platform 🙂