covert MainPackageCongfig to Kotlin

[alanleedev]

Summary: convert Java to Kotlin: react/shell/MainPackageConfig.java

Changelog: [Internal] internal

Differential Revision: D55627449

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D55627449

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	18,906,369	+1
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	22,275,007	-1
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: 0b23ff6631c1ec96bd867ba4206729e4d13155b2 Branch: main

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D55627449

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D55627449

[facebook-github-bot]

This pull request has been merged in facebook/react-native@b09f378320a4115c55c0b1ab2a8225766d607729.

[github-actions[bot]]

This pull request was successfully merged by @alanleedev in b09f378320a4115c55c0b1ab2a8225766d607729.

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