iosWebViewFix/android/src/main/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pichillilorenzo.flutter_inappbrowser">

    <uses-permission android:name="android.permission.INTERNET" />

    <application>
        <activity android:theme="@style/AppTheme" android:name=".WebViewActivity" android:configChanges="orientation|screenSize"></activity>
        <activity android:theme="@style/ThemeTransparent" android:name=".chrome_custom_tabs.ChromeCustomTabsActivity" android:configChanges="orientation|screenSize"></activity>
    </application>

</manifest>