Bump AGP to 8.4.0

[arushikesarwani94]

Summary: Just keeping our version of AGP up to date.

Changelog: [Internal] [Changed] - Bump AGP to 8.4.0

Differential Revision: D57104079

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D57104079

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	19,495,382	+20
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	22,867,572	-4
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: 4290ef5d0d30d33e9bf26eb33d8bda86de0dd1ce Branch: main

[facebook-github-bot]

This pull request has been merged in facebook/react-native@5c798fa2df3afae6e322f37e67e792b0c14f023a.

[github-actions[bot]]

This pull request was successfully merged by @cortinico in 5c798fa2df3afae6e322f37e67e792b0c14f023a.

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