Prevent usage of Array index in keys

[isaaclem]

To ensure source code conform with no-array-index-key rules: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-array-index-key.md

Summary

Changelog

[General] [Fixed] - To avoid using index as key

Test Plan

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Code analysis results:

• eslint found some issues. Run yarn lint --fix to automatically fix problems.

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[isaaclem]

For the changes I've made, it simply doesn't makes any sense for failing the ci tests

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@osdnk 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 @isaaclem in 36d4a96.

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