Getting "org.openqa.selenium.UnsupportedCommandException: getSession" while using java-client 6.0.0 when we call AndroidDriver<>(new HttpCommandExecutor(url), capabilities);

Description

Getting "org.openqa.selenium.UnsupportedCommandException: getSession" while using java-client 6.0.0 when we call AndroidDriver<>(new HttpCommandExecutor(url), capabilities);
It's working fine in java-client 6.0.0 Beta4.
But it does not work in java-client 6.0.0 Beta5.

Environment

• java client build version or git revision if you use some shapshot:
• Appium server version or git revision if you use some shapshot:
• Desktop OS/version used to run Appium if necessary:
• Node.js version (unless using Appium.app|exe) or Appium CLI or Appium.app|exe:
• Mobile platform/version under test:
• Real device or emulator/simulator:

Details

Please provide more details, if necessary.

Code To Reproduce Issue [ Good To Have ]

public class AppiumTest {

public static AndroidDriver<?> mobileDriver = null;

public static void main(String[] args) throws MalformedURLException, Exception {
	// TODO Auto-generated method stub

	try {
		URL url = new URL("http://0.0.0.0:4723/wd/hub");

		// This is Launcher activity of your app
		// (you can get it from apk info app)
		// This package name of your app (you can get it from apk info app)

		DesiredCapabilities capabilities = new DesiredCapabilities();

// capabilities.setCapability(MobileCapabilityType.BROWSER_NAME, "Android");
capabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "GalaxyS5");
capabilities.setCapability("platformName", "Android");
capabilities.setCapability(MobileCapabilityType.AUTOMATION_NAME, AutomationName.ANDROID_UIAUTOMATOR2);
capabilities.setCapability(MobileCapabilityType.APP,
"C:\Users\bharavin\Downloads\com.snapdeal.main_2018-01-26.apk");
capabilities.setCapability(MobileCapabilityType.NEW_COMMAND_TIMEOUT, 120);
// capabilities.setCapability(MobileCapabilityType.APPLICATION, "com.snapdeal.main");
capabilities.setCapability(MobileCapabilityType.UDID, "4d007c754dca412f");

AndroidDriver mobileDriver = new AndroidDriver<>(new HttpCommandExecutor(url), capabilities);

		//AppiumDriver<AndroidElement> mobileDriver = new AppiumDriver<>(url, capabilities);
		//AndroidDriver<AndroidElement> mobileDriver = new AndroidDriver<>(url, capabilities);
		mobileDriver.getSessionId();
		mobileDriver.installApp("C:\\Users\\bharavin\\Downloads\\com.snapdeal.main_2018-01-26.apk");

		System.out.println("App Installed");
		Thread.sleep(6000);
		mobileDriver.launchApp();
		System.out.println("App Launched");
		Thread.sleep(6000);
		mobileDriver.findElement(By.xpath("//android.widget.TextView[contains(@text,'Fashion')]")).click();
		System.out.println("Element located and clicked on App");
		Thread.sleep(6000);
		mobileDriver.quit();

		Thread.sleep(3000);

	} catch (Exception e) {
		// mobileDriver = null;
		e.printStackTrace();
		// System.out.println(e.toString());

	}

}

}

Ecxeption stacktraces

Jun 21, 2018 8:02:48 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
org.openqa.selenium.UnsupportedCommandException: getSession
Build info: version: '3.7.1', revision: '8a0099a', time: '2017-11-06T21:01:39.354Z'
System info: ', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_161'
Driver info: driver.version: AndroidDriver
at org.openqa.selenium.remote.http.AbstractHttpCommandCodec.encode(AbstractHttpCommandCodec.java:219)
at org.openqa.selenium.remote.http.AbstractHttpCommandCodec.encode(AbstractHttpCommandCodec.java:118)
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:600)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:46)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
at io.appium.java_client.HasSessionDetails.getSessionDetails(HasSessionDetails.java:39)
at io.appium.java_client.HasSessionDetails.getSessionDetail(HasSessionDetails.java:56)
at io.appium.java_client.HasSessionDetails.getPlatformName(HasSessionDetails.java:65)
at io.appium.java_client.internal.JsonToMobileElementConverter.(JsonToMobileElementConverter.java:49)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:89)
at io.appium.java_client.android.AndroidDriver.(AndroidDriver.java:78)
at com.appiumupgrade.check.AppiumTest.main(AppiumTest.java:60)

Link to Appium logs

[Appium] Welcome to Appium v1.8.1
[Appium] Appium REST http interface listener started on 0.0.0.0:4723

Appium server is not hit at all. No logs updated.

java file attached for reference.

@TikhomirovSergey @saikrishna321