iOS builds fail in devicelab, cannot find protocol declaration for 'UIPointerInteractionDelegate'

[jmagman]

On engine roll a27b843

stdout:                /Users/flutter/.cocoon/flutter/bin/cache/artifacts/engine/ios-release/Flutter.xcframework/ios-armv7_arm64/Flutter.framework/Headers/FlutterViewController.h:52:72: error: cannot find protocol declaration for 'UIPointerInteractionDelegate'
stdout:                    : UIViewController <FlutterTextureRegistry, FlutterPluginRegistry, UIPointerInteractionDelegate>
stdout:                                                                                       ^
stdout:                1 error generated.
stdout:                In file included from /Users/flutter/.cocoon/flutter/packages/integration_test/ios/Classes/IntegrationTestPlugin.m:5:
stdout:                /Users/flutter/.cocoon/flutter/packages/integration_test/ios/Classes/IntegrationTestPlugin.h:5:9: fatal error: could not build module 'Flutter'
stdout:                #import <Flutter/Flutter.h>
stdout:                 ~~~~~~~^
stdout:                2 errors generated.

large_image_changer_perf_ios_a27b843_2.log

https://flutter-dashboard.appspot.com/api/get-log?ownerKey=ahFmbHV0dGVyLWRhc2hib2FyZHJfCxIJQ2hlY2tsaXN0Ij9mbHV0dGVyL2ZsdXR0ZXIvbWFzdGVyL2EyN2I4NDNiYzY2NTdjOTAxZmJjNzUwMDMzMTYyMmExNmZkM2Q1NzQMCxIEVGFzaxiAgNjqgObeCAw

\cc @gw280 flutter/engine#23362

[jmagman]

Needs a iOS 13.4 availability guard.

[github-actions]

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