Only find closest font if system font was not found

[danilobuerger]

Summary

Before f951da9 finding a system font used to return early. In order to allow variants, the referenced patch removed the early return so that variants could be applied later. However, there is no need to find the closest font as we already selected the proper system font. This also fixes a bug with setting a custom font handler via RCTSetDefaultFontHandler whos return could get overwritten by the closest font search.

Changelog

[iOS] [Fixed] - Respect RCTSetDefaultFontHandler chosen font

Test Plan

[danilobuerger]

cc @jacobp100 since this references your commit.

[pull-bot]

PR build artifact for 0c5d6e6 is ready.
To use, download tarball from "Artifacts" tab in this CircleCI job then run yarn add <path to tarball> in your React Native project.

[pull-bot]

PR build artifact for 5482c58 is ready.
To use, download tarball from "Artifacts" tab in this CircleCI job then run yarn add <path to tarball> in your React Native project.

[danilobuerger]

the failing test seem unrelated to my commit

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	8,297,788	+0
android	hermes	armeabi-v7a	7,634,879	+0
android	hermes	x86	8,771,104	+0
android	hermes	x86_64	8,708,122	+0
android	jsc	arm64-v8a	9,783,593	+0
android	jsc	armeabi-v7a	8,768,874	+0
android	jsc	x86	9,749,504	+0
android	jsc	x86_64	10,345,405	+0

Base commit: d6db5c5
Branch: main

[pull-bot]

PR build artifact for 4d8cf39 is ready.
To use, download tarball from "Artifacts" tab in this CircleCI job then run yarn add <path to tarball> in your React Native project.

[cortinico]

Hey @danilobuerger, Thanks for the PR.
Could you please rebase the CI on top of main as the CI is currently red?

[analysis-bot]

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

Base commit: d6db5c5
Branch: main

[danilobuerger]

@cortinico Hi, I rebased it. One test is still failing which seems unrelated to my change.

[facebook-github-bot]

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

[react-native-bot]

This pull request was successfully merged by @danilobuerger in 89efa1a.

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