Update the FlatList Component in Lists

[ayushjainrksh]

Fixes MLH-Fellowship#32

Summary

The PR is part of an effort to update the code comments to match the current documentation on the React Native website. The project is a part of MLH fellowship program and involves automatic generation of the website docs from code comments and flow types as the end result.

To learn more about the project you can visit the project wiki:

• Project details
• RN Docs Standards

Link to the documentation(the source of truth):

• flatlist.md

Changes

• Update the title, prop descriptions and method descriptions from docs.
• Add SnackPlayer examples.
• Remove unnecessary * in comments.
• Cap comments to 80 characters.
• Add platform, type and default annotations.
• Add comments to method flowTypes for parsing docs.

Changelog

[Internal]

Test Plan

All changes are made to the code comments and thus there is no need for testing.

Reviewed by @jevakallio

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	6,760,785	-1,081,318
android	hermes	armeabi-v7a	6,423,738	-1,032,142
android	hermes	x86	7,147,287	-1,153,307
android	hermes	x86_64	7,037,183	-1,156,437
android	jsc	arm64-v8a	8,934,366	-1,067,259
android	jsc	armeabi-v7a	8,589,686	-1,017,863
android	jsc	x86	8,763,984	-1,124,234
android	jsc	x86_64	9,339,498	-1,127,938

Base commit: b2570bd

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	829440	n/a

Base commit: 0f24b1b

[charlesbdudley]

Thanks for this contribution, @ayushjainrksh, and apologies for not getting around to it until now. This MLH-Fellowship project is not currently being worked on so we're going to close this PR to focus on active ones. If you feel this is an error or if you'd like to pick this up again, please let me know!