Add manifest placeholder to :app:ui:legacy module

        debug {

            def useNewSetupUi = project.hasProperty('k9mail.useNewSetupUi') ? project.property('k9mail.useNewSetupUi') : "false"

            buildConfigField "boolean", "USE_NEW_SETUP_UI_FOR_ONBOARDING", useNewSetupUi

            manifestPlaceholders = ['appAuthRedirectScheme': 'FIXME: override this in your app project']

        }

        release {

            buildConfigField "boolean", "USE_NEW_SETUP_UI_FOR_ONBOARDING", "false"

            manifestPlaceholders = ['appAuthRedirectScheme': 'FIXME: override this in your app project']

        }

    }