ring-android/app/src/main/res/values-night/styles.xml

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style name="AppTheme" parent="AppThemeBase">
        <item name="android:statusBarColor">@color/transparent</item>
        <item name="android:navigationBarColor">@color/background</item>
    </style>

    <style name="AppTheme.Fullscreen" parent="AppThemeBase.Fullscreen" />

    <style name="AppTheme.DarkToolbar" parent="AppThemeBase.DarkToolbar">
        <item name="android:navigationBarColor">@color/background</item>
    </style>

</resources>