Disable defaultFocusHighlightEnabled in the android part for a Xamarin.Forms application

In a xamarin.forms application running in an android 8 device I want to disable the controls highlights when I'm using a physical keyboard (this is a new android 8 behavior)

The android documentation says that I should set android:defaultFocusHighlightEnabled="false" for that

I tried to add that in my manifest file but the highlight continues appearing

<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:defaultFocusHighlightEnabled="false" android:versionName=

Where can I set that globally?

Solution

I was able to solve the issue with the comments

In my styles.xml file (referenced in the main activity) I added the entry in the theme

MainActivity.cs

[Activity(Label = "Sage Service Ops", Icon = "@drawable/icon", MainLauncher = false, Theme = "@style/MyTheme", ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity

styles.xml

<style name="MyTheme" parent="@android:style/Theme.Holo.Light">
  <item name="android:actionBarStyle">@style/MyTheme.ActionBarStyle</item>
  <item name="android:defaultFocusHighlightEnabled">false</item>
</style>