fs.asset() function inconsistent between platforms

[benvium]

On Android, the fs.asset('path/to/file') function returns a path that when used with fs functions, works on files embedded in the APK app bundle, specifically from the app/src/main/assets directory. This works great.
(reference for Java implementation)

On iOS, I expected that fs.asset('path/to/file') would return a path that allows access to files embedded in the IPA app bundle, e.g. ${fs.dirs.MainBundleDir}/path/to/file.
However it actually returns a path that allows access to the camera roll.
(reference in js)

This is easy to work around of course.
It'd be a breaking change to adjust this (perhaps add new function fs.js | cameraRoll(path:string)?

I can send a PR if this is useful.

[wkh237]

@benvium , thanks for the advice 👍 I'll add this one to 0.11.0 milestone 😄