Use a list for night themes

Also remove unused strings

app/src/main/res/values-eo/strings.xml

@@ -579,6 +579,4 @@
     <string name="artists">Artistoj</string>
     <string name="albums">Albumoj</string>
     <string name="songs">Kantoj</string>
-    <string name="follow_device_theme_title">Sekvi la etoson de la aparato</string>
-    <string name="follow_device_theme_summary">La apo sekvos la etoson de la aparato. Ĝi povus malfunkcii se via Android versiono malsupras Android 10.</string>
 </resources>

app/src/main/res/values-fr/strings.xml

@@ -41,6 +41,7 @@
     <string name="use_tor_title">Utiliser Tor</string>
     <string name="use_tor_summary">(Expérimental) Forcer la redirection du trafic de téléchargement via Tor pour plus de confidentialité (les flux vidéos ne sont pas encore pris en charge).</string>
     <string name="theme_title">Thème</string>
+    <string name="night_theme_title">Thème nuit</string>
     <string name="dark_theme_title">Sombre</string>
     <string name="light_theme_title">Clair</string>
     <string name="black_theme_title">Noir</string>
@@ -669,6 +670,7 @@
     <string name="paid_content">Ce contenu n\'est disponible que pour les abonnés, il ne peut donc pas être diffusé en continu ni téléchargé par NewPipe.</string>
     <string name="youtube_music_premium_content">Cette vidéo n\'est disponible que pour les membres de YouTube Music Premium, elle ne peut donc pas être diffusée en continu ni téléchargée par NewPipe.</string>
     <string name="private_content">Ce contenu est privé, il ne peut donc pas être diffusé en continu ni téléchargé par NewPipe.</string>
-    <string name="follow_device_theme_title">Suivre le thème de l\'appareil</string>
-    <string name="follow_device_theme_summary">L\'application suivera le thème de votre appareil. Il se peut que ça ne marche pas si vous utiliser une version d\'Android inférieure à 10.</string>
+    <string name="auto_device_theme_title">Automatique (thème de l\'appareil)</string>
+    <string name="night_theme_summary">Choisissez votre thème nuit favori — %s</string>
+    <string name="select_night_theme_toast">Vous pouvez chosir votre thème nuit favori</string>
 </resources>

app/src/main/res/values/settings_keys.xml

@@ -176,21 +176,33 @@
 
     <!-- THEMES -->
     <string name="theme_key" translatable="false">theme</string>
+    <string name="night_theme_key" translatable="false">night_theme</string>
     <string name="light_theme_key" translatable="false">light_theme</string>
     <string name="dark_theme_key" translatable="false">dark_theme</string>
     <string name="black_theme_key" translatable="false">black_theme</string>
+    <string name="auto_device_theme_key" translatable="false">auto_device_theme</string>
     <string name="default_theme_value" translatable="false">@string/dark_theme_key</string>
+    <string name="default_night_theme_value" translatable="false">@string/dark_theme_key</string>
     <string-array name="theme_values_list" translatable="false">
         <item>@string/light_theme_key</item>
         <item>@string/dark_theme_key</item>
         <item>@string/black_theme_key</item>
+        <item>@string/auto_device_theme_key</item>
     </string-array>
     <string-array name="theme_description_list" translatable="false">
         <item>@string/light_theme_title</item>
         <item>@string/dark_theme_title</item>
         <item>@string/black_theme_title</item>
+        <item>@string/auto_device_theme_title</item>
+    </string-array>
+    <string-array name="night_theme_values_list" translatable="false">
+        <item>@string/dark_theme_key</item>
+        <item>@string/black_theme_key</item>
+    </string-array>
+    <string-array name="night_theme_description_list" translatable="false">
+        <item>@string/dark_theme_title</item>
+        <item>@string/black_theme_title</item>
     </string-array>
-    <string name="use_device_theme_key" translatable="false">use_device_theme_key</string>
 
     <!-- Caption Size -->
     <string name="caption_settings_key" translatable="false">caption_settings_key</string>

app/src/main/res/values/strings.xml

@@ -79,11 +79,10 @@
     <string name="default_audio_format_title">Default audio format</string>
     <string name="default_video_format_title">Default video format</string>
     <string name="theme_title">Theme</string>
+    <string name="night_theme_title">Night Theme</string>
     <string name="light_theme_title">Light</string>
     <string name="dark_theme_title">Dark</string>
     <string name="black_theme_title">Black</string>
-    <string name="device_dark_theme_title">Device theme (Dark)</string>
-    <string name="device_black_theme_title">Device theme (Black)</string>
     <string name="popup_remember_size_pos_title">Remember popup properties</string>
     <string name="popup_remember_size_pos_summary">Remember last size and position of popup</string>
     <string name="use_inexact_seek_title">Use fast inexact seek</string>
@@ -711,6 +710,7 @@
     <string name="paid_content">This content is only available to users who have paid, so it cannot be streamed or downloaded by NewPipe.</string>
     <string name="featured">Featured</string>
     <string name="radio">Radio</string>
-    <string name="follow_device_theme_title">Follow device theme</string>
-    <string name="follow_device_theme_summary">The app theme will follow your device theme. It may not work for devices below Android 10.</string>
+    <string name="auto_device_theme_title">Automatic (device theme)</string>
+    <string name="night_theme_summary">Select your favorite night theme — %s</string>
+    <string name="select_night_theme_toast">You can select your favorite night theme below</string>
 </resources>

app/src/main/res/xml/appearance_settings.xml

@@ -12,11 +12,13 @@
         android:title="@string/theme_title"
         app:iconSpaceReserved="false" />
 
-    <SwitchPreferenceCompat
-        android:defaultValue="false"
-        android:key="@string/use_device_theme_key"
-        android:summary="@string/follow_device_theme_summary"
-        android:title="@string/follow_device_theme_title"
+    <ListPreference
+        android:defaultValue="@string/default_night_theme_value"
+        android:entries="@array/night_theme_description_list"
+        android:entryValues="@array/night_theme_values_list"
+        android:key="@string/night_theme_key"
+        android:summary="@string/night_theme_summary"
+        android:title="@string/night_theme_title"
         app:iconSpaceReserved="false" />
 
     <SwitchPreferenceCompat