Fix alert screen crash in android in RNTester app

[anku255]

Summary

fixes - MLH-Fellowship#21

Reviewed by @jevakallio

Changelog

Before:

After:

Test Plan

1. Run the RNTester app locally on both android and iOS.
2. Open the Alert API screen.
3. Alert examples should be visible and functional in both android and iOS.

Screenshot for both android and iOS screens-

[facebook-github-bot]

Hi @anku255!

Thank you for your pull request and welcome to our community.We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file.

In order for us to review and merge your code, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

If you have received this in error or have any questions, please contact us at [email protected]. Thanks!

[pull-bot]

Messages

📖

📋 Verify Changelog Format - A changelog entry has the following format: [CATEGORY] [TYPE] - Message. Details CATEGORY may be: General iOS Android JavaScript Internal (for changes that do not need to be called out in the release notes) TYPE may be: Added, for new features. Changed, for changes in existing functionality. Deprecated, for soon-to-be removed features. Removed, for now removed features. Fixed, for any bug fixes. Security, in case of vulnerabilities. MESSAGE may answer "what and why" on a feature level. Use this to briefly tell React Native users about notable changes.

Generated by 🚫 dangerJS against f2409db

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: b69041f

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!

[facebook-github-bot]

@rickhanlonii has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[react-native-bot]

This pull request was successfully merged by @anku255 in f898bb6.

^{When will my fix make it into a release? | Upcoming Releases}

[rickhanlonii]

Thanks @anku255!