fix: Make file format attachment less rigid

[diegolmello]

Proposed changes

In some cases, the URL returned by formatAttachmentUrl wouldn't consider local files and the code would get to this line

Rocket.Chat.ReactNative/app/lib/methods/helpers/formatAttachmentUrl.ts

Line 32 in 7913429

return setParamInUrl({ url: `${server}${attachmentUrl}`, token, userId });

The result would be an invalid URL like ${server}${localFile} -> https://open.rocket.chatfile://var/mobile...

I was not able to reproduce the issue, but since the code on this function is fairly straightforward and the only condition that should consider local files was based on a specific local directory (FileSystem.documentDirectory), I've decided to relax this rule a little bit by just checking file://.

Issue(s)

How to test or reproduce

Screenshots

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments

NATIVE-655

[OtavioStasiak]

The code is well-written, the purpose of the change is clearly defined, and it didn't break anything on either platform.