To manually update settings.gradle, follow these steps:

1. Copy `settings.gradle` as `settings_aar.gradle`
2. Remove the following code from `settings_aar.gradle`:

        def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()

        def plugins = new Properties()
        def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
        if (pluginsFile.exists()) {
            pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
        }

        plugins.each { name, path ->
            def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
            include ":$name"
            project(":$name").projectDir = pluginDirectory
        }