app/src/main/res/values-v29/arrays.xml

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

    <string-array name="pref_theme_entries" tools:ignore="InconsistentArrays">
        <item>@string/preferences_system_theme</item>
        <item>@string/preferences_light_theme</item>
        <item>@string/preferences_dark_theme</item>
        <item>@string/preferences_black_theme</item>
    </string-array>

    <string-array name="pref_theme_values" translatable="false" tools:ignore="InconsistentArrays">
        <item>system</item>
        <item>light</item>
        <item>dark</item>
        <item>black</item>
    </string-array>

</resources>