Fix RCTAlertController import when embed in existing iOS projects

[nickfujita]

Summary

Fixes a build error relating to RCTAlertController import when embedding react-native into existing iOS app. This PR resolves the issue detailed in #32356

Changelog

Adjusts the import syntax which was added in:
f319ff3#diff-56beca6ee071cdd162c269ce765ab12d5af8c8c0ca840bca1e9d1f59e9fab790

Existing:
#import "RCTAlertController.h"

New:
#import <React/RCTAlertController.h>

[iOS] [Fix] - Fix RCTAlertController import build error when embedded in existing iOS projects

Test Plan

Build this branch in existing iOS project using swift, and should not have the build error described in the issue above.

Would also like to have this fix cherry-pick'd to release 0.63 after merging.

[pull-bot]

Messages

📖

📋 Verify Changelog Format - A changelog entry has the following format: [CATEGORY] [TYPE] - Message. CATEGORY may be: General iOS Android JavaScript Internal (for changes that do not need to be called out in the release notes) TYPE may be: Added, for new features. Changed, for changes in existing functionality. Deprecated, for soon-to-be removed features. Removed, for now removed features. Fixed, for any bug fixes. Security, in case of vulnerabilities. MESSAGE may answer "what and why" on a feature level. Use this to briefly tell React Native users about notable changes.

Generated by 🚫 dangerJS against 8296605

[pull-bot]

PR build artifact for 8296605 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.

[analysis-bot]

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

Base commit: 3f62904
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	8,310,550	+0
android	hermes	armeabi-v7a	7,874,682	+0
android	hermes	x86	8,677,595	+0
android	hermes	x86_64	8,636,752	+0
android	jsc	arm64-v8a	9,812,913	+0
android	jsc	armeabi-v7a	8,773,855	+0
android	jsc	x86	9,761,830	+0
android	jsc	x86_64	10,362,687	+0

Base commit: 3f62904
Branch: main

[facebook-github-bot]

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

[facebook-github-bot]

@charlesbdudley merged this pull request in 614e602.