fix(ios, storage): handle nil file extension from ios14 M1 emulators

[Maxoos]

Description

This fix resolves a crash that occurs when pathExtension returns NULL, failing to detect file extension. This was detected as a result of a simulator bug with Apple Silicon Macs where pathExtension returns NULL only iOS14 (works as expected on iOS13).

This bug would probably surface on any device if file extension could not be detected when calling mimeTypeForPath, this could be used to verify the fix on intel Macs.

Related issues

Fixes #4661

Release Summary

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

Verified mimeTypeForPath function on Apple Silicon with iOS14 sim to return @"application/octet-stream". Verified CFRelease is being called on iOS13 sim.

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[CLAassistant]

All committers have signed the CLA.

[mikehardy]

Thanks @Maxoos - it looks like the CLA still isn't signed? If you can sign that I can work this through the QA process and merge it

[mikehardy]

Hi @Maxoos ! Unfortunately without the CLA signed (you can follow the instructions above or click the 'details' link on the license/cla check) we cannot merge this and I will have to close it

[Maxoos]

Sorry @mikehardy was a bit full on before the holidays. Should be all sorted now!

[codecov]

Codecov Report

Merging #4676 (72e961f) into master (50ecf38) will not change coverage.
The diff coverage is n/a.

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  Coverage   89.09%   89.09%           
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  Lines        3712     3712           
  Branches      347      347           
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  Hits         3307     3307           
  Misses        363      363           
  Partials       42       42