18.5:9 Android ratio force to 16:9 problem in Unity

I want to my game build in devices with 18.5:9 ratio like Samsung S8 forced to be displayed as 16:9 ratio. I already set Aspect ratio mode to Custom and set it to 1.86 in Player Settings. I also overrided Android Manifest like this:

    <?xml version="1.0" encoding="utf-8"?>     <manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.unity3d.player" xmlns:tools="http://schemas.android.com/tools" android:installLocation="preferExternal">     <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true" />     <application android:theme="@style/UnityThemeSelector" android:icon="@drawable/app_icon" android:label="@string/app_name" android:isGame="true" android:banner="@drawable/app_banner">   <activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name" android:screenOrientation="sensorLandscape" android:launchMode="singleTask" android:maxAspectRatio="1.86" android:resizeableActivity="false" android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale|layoutDirection|density" android:hardwareAccelerated="false">   <intent-filter>     <action android:name="android.intent.action.MAIN" />     <category android:name="android.intent.category.LAUNCHER" />     <category android:name="android.intent.category.LEANBACK_LAUNCHER" />   </intent-filter>   <meta-data android:name="unityplayer.UnityActivity" android:value="true" />   </activity>   <meta-data android:name="unity.build-id" android:value="633a700a-7389-4a19-972c-ac1f177788f8" />   <meta-data android:name="unity.splash-mode" android:value="0" />   <meta-data android:name="unity.splash-enable" android:value="True" />   <meta-data android:name="android.max_aspect" android:value="1.86" />    </application>   <uses-feature android:glEsVersion="0x00020000" />   <uses-permission android:name="android.permission.INTERNET" />   <uses-feature android:name="android.hardware.touchscreen"  android:required="false" />   <uses-feature android:name="android.hardware.touchscreen.multitouch"  android:required="false" />   <uses-feature android:name="android.hardware.touchscreen.multitouch.distinct" android:required="false" />   </manifest> 

And as you see add attributes like android:maxAspectRatio & android:resizeableActivity to AndroidManifest manually.

But by installing the app on devices with that specific ratio, the game still running full screen and out of the bounds. I am using Unity 2018.1.4f1 (64bit).