Disabling Multi-window feature for Cordova Android App

Open AndroidManifest.xml and look for Main activity

<activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|smallestScreenSize|screenLayout|uiMode|navigation" android:exported="true" android:label="@string/activity_name" android:launchMode="singleTop" android:name="MainActivity" android:screenOrientation="portrait" android:theme="@style/Theme.App.SplashScreen" android:windowSoftInputMode="adjustResize">
	<intent-filter android:label="@string/launcher_name">
		<action android:name="android.intent.action.MAIN" />
		<category android:name="android.intent.category.LAUNCHER" />
	</intent-filter>
</activity>

Now add following attribute to the activity section

android:resizeableActivity="false"

After adding the attribute the activity section would like as following

<activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|smallestScreenSize|screenLayout|uiMode|navigation" android:exported="true" android:label="@string/activity_name" android:launchMode="singleTop" android:name="MainActivity" android:resizeableActivity="false" android:screenOrientation="portrait" android:theme="@style/Theme.App.SplashScreen" android:windowSoftInputMode="adjustResize">
	<intent-filter android:label="@string/launcher_name">
		<action android:name="android.intent.action.MAIN" />
		<category android:name="android.intent.category.LAUNCHER" />
	</intent-filter>
</activity>