Extract fragment conversions to separate functions

[cubuspl42]

Summary:

Extract fragment conversions to separate functions to make refactoring easier and simplify reasoning about the code.

This code is being modified later.

This is a minor improvement in the context of my multi-PR work on react-native-community/discussions-and-proposals#695.

Changelog:

[INTERNAL] [CHANGE] - Extract fragment conversions to separate functions

Test Plan:

[cubuspl42]

@robhogan Any chance you could review this?

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	16,951,079	+5,896
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	20,334,844	+2,344
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: 6d77d7b
Branch: main

[robhogan]

I understand these are being extracted for reuse to support different fragment types in a PR coming soon? LGTM.

[facebook-github-bot]

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

[cubuspl42]

@robhogan Kind of! I'm modifying the whole structure, adding another layer on top of fragments (the codename for that layer is "shards"). I'm doing all I can to make the diff of the upcoming "substantial" changes as easy to review as possible, so I'm submitting a wave of smaller PRs cleaning up the relevant codebase fragments.

[cubuspl42]

@robhogan Thank you so much for the quick review! If you are in a reviewing mood, you can also take a look at one or two similar tiny PRs: (my PRs) 😄

[facebook-github-bot]

@robhogan merged this pull request in 2722f95.