Show brigthness preference in reader settings. #106

app/src/main/res/xml/pref_reader.xml

@@ -17,6 +17,10 @@
         android:key="@string/pref_show_page_number_key"
         android:defaultValue="true" />
 
+    <SwitchPreference android:title="@string/pref_custom_brightness"
+        android:key="@string/pref_custom_brightness_key"
+        android:defaultValue="false" />
+
     <eu.kanade.tachiyomi.widget.preference.IntListPreference
         android:title="@string/pref_viewer_type"
         android:key="@string/pref_default_viewer_key"