Pass unflattened styles to reconciler

[javache]

Summary: When React diffs props, it can can short-circuit nested objects if their object identity hasn't changed. Whenever we use flattenStyle we prevent this optimization from taking place.

Changelog: [Internal]

Differential Revision: D59518281

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D59518281

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	21,300,464	-34
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	24,497,477	+8
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: ef2e9410d03215f70277accd2ce4badf3cee6783 Branch: main

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D59518281

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D59518281

[facebook-github-bot]

This pull request has been merged in facebook/react-native@d9d638c06bfa55d7562564bb5ae08ecbaf00eee7.

[react-native-bot]

This pull request was successfully merged by @javache in d9d638c06bfa55d7562564bb5ae08ecbaf00eee7

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