minetest/build/android/src/main/res/values-v21/styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:tools="http://schemas.android.com/tools">

	<style name="AppTheme" parent="android:Theme.Material.Light.NoActionBar.Fullscreen">
		<item name="android:windowNoTitle">true</item>
		<item name="android:windowBackground">@drawable/bg</item>
		<item name="android:windowLayoutInDisplayCutoutMode" tools:ignore="NewApi" tools:targetApi="o_mr1">
			shortEdges
		</item>
	</style>

	<style name="Theme.Dialog" parent="@android:style/Theme.Material.Light.Dialog.NoActionBar">
		<item name="android:windowNoTitle">true</item>
		<item name="android:windowBackground">@android:color/transparent</item>
	</style>

</resources>