wulkanowy-mod/app/src/main/res/values-v29/preferences_values.xml

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:tools="http://schemas.android.com/tools">
    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
        <item>System theme</item>
        <item>Light</item>
        <item>Dark</item>
        <item>Black (AMOLED)</item>
    </string-array>
    <string-array name="app_theme_values" translatable="false" tools:ignore="InconsistentArrays">
        <item>system</item>
        <item>light</item>
        <item>dark</item>
        <item>black</item>
    </string-array>
</resources>