Do not attempt to call `Class.forName` in OSS

[cortinico]

Summary: We should not attempt to load generated classes by the Annotation processor in OSS because we simply don't run it, so those classes will fail to load. I'm short-circuiting the logic here.

This is sustainability work as we got a report for this in OSS a while ago and I never got the time to work on it.

Changelog: [Internal] [Changed] - Do not attempt to call Class.forName in OSS

Differential Revision: D55693479

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D55693479

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	18,910,458	+10
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	22,279,111	+4
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: e1800726af78c7c01a20d13b8dd390ed4aa35c14 Branch: main

[facebook-github-bot]

This pull request has been merged in facebook/react-native@26cc8cddf98cfefcfa35fba58da08587febdf926.

[github-actions[bot]]

This pull request was successfully merged by @cortinico in 26cc8cddf98cfefcfa35fba58da08587febdf926.

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