Why two apps are getting deployed in android?

I'm deploying an app which displays a splash screen.It deploys successfully but there is two apk being deployed at same time. If I try to delete one app both are getting deleted.It is quite strange.This is the code of my app.
MainActivity.cs
[Activity(Label = "abcTest", Icon = "@drawable/ic_logo_abc", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;

                        base.OnCreate(bundle);

                        global::Xamarin.Forms.Forms.Init(this, bundle);
                        LoadApplication(new App());
                    }
                }

Another activity created for splash screen
[Activity(Theme = "@style/Theme.Splash",
MainLauncher = true,
NoHistory = true)]
//[Activity(Label = "Vent_SplashActivity")]
public class Vent_SplashActivity : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
System.Threading.Thread.Sleep(3000);
StartActivity(typeof(MainActivity));

                    // Create your application here
                }
            }

splashscreen.xml

             <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
                        <item>
                         <shape android:shape="rectangle">
                            <solid android:color="@android:color/white" />
                                </shape>
                              </item>
                              <item>
                                <bitmap android:gravity="center" android:src="@drawable/splashnew" />
                              </item>
                            </layer-list>

** style.xml**

                            <style name="Theme.Splash"  parent="android:Theme">
                                <item name="android:windowBackground">@drawable/splash_screen</item>
                                <item name="android:windowNoTitle">true</item>
                              </style>....

Please help me with this.