Appium flutter integration driver is available only for real devices (#…

…2953)

* Document that appium flutter is available only for real devices

* Update docs/mobile-apps/automated-testing/appium/appium-flutter-integration-driver.md

Co-authored-by: Thiago Veronese <59449233+thiagosaucelabs@users.noreply.github.com>

---------

Co-authored-by: Thiago Veronese <59449233+thiagosaucelabs@users.noreply.github.com>

docs/mobile-apps/automated-testing/appium/appium-flutter-integration-driver.md

@@ -9,6 +9,8 @@ import useBaseUrl from '@docusaurus/useBaseUrl';
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
+<p><span className="sauceGreen">Real Devices</span></p>
+
 Sauce Labs supports testing Flutter apps on Android and iOS real devices with Appium by utilizing the [appium-flutter-integration-driver](https://github.com/AppiumTestDistribution/appium-flutter-integration-driver). 
 The process to test Flutter apps with Appium involves an additional and crucial step: [Prepare the app with Flutter Integration Server](#prepare-the-app-with-flutter-integration-server). 
 This step includes instructions on how to prepare and build your app for both Android and iOS platforms. After preparing your app, 
@@ -48,8 +50,11 @@ This driver is built using [Flutter Integration Test](https://docs.flutter.dev/c
 
 ## What You'll Need
 
+- A Sauce Labs account ([Log in](https://accounts.saucelabs.com/am/XUI/#login/) or sign up for a [free trial license](https://saucelabs.com/sign-up))
+- Your Sauce Labs [Username and Access Key](https://app.saucelabs.com/user-settings)
 - Familiarity with creating, signing and building [Flutter apps](https://docs.flutter.dev/).
 - Familiarity writing and running [Appium tests](/mobile-apps/automated-testing/appium/).
+- Note: The Appium Flutter Integration Driver is only available for real devices on Sauce Labs.
 
 ## Use Sauce Labs `My Demo App Flutter`