3490 Remove iOS stubs (cla: yes, p: android_alarm_manager, p: android_intent, p: connectivity, p: espresso, p: file_selector, p: flutter_plugin_android_lifecycle, p: google_maps_flutter, p: google_sign_in, p: image_picker, p: integration_test, p: path_provider, p: shared_preferences, p: url_launcher, p: video_player, platform-ios, platform-linux, platform-macos, platform-web, platform-windows)

3498 [path_provider] Update macOS for NNBD (cla: yes, nnbd, p: path_provider, platform-macos)

3505 [shared_preferences] Update macOS for NNBD (cla: yes, nnbd, p: shared_preferences, platform-macos)