Add a temporary way to select download directory

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

@@ -2,6 +2,7 @@
 <resources>
     <string name="pref_category_reader_key">pref_category_reader_key</string>
     <string name="pref_category_accounts_key">pref_category_accounts_key</string>
+    <string name="pref_category_downloads_key">pref_category_downloads_key</string>
     <string name="pref_fullscreen_key">pref_fullscreen_key</string>
     <string name="pref_default_viewer_key">pref_default_viewer_key</string>
     <string name="pref_download_directory_key">pref_download_directory_key</string>

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

@@ -52,6 +52,7 @@
     <string name="title_activity_settings">Settings</string>
     <string name="pref_category_reader">Reader</string>
     <string name="pref_category_accounts">Accounts</string>
+    <string name="pref_category_downloads">Downloads</string>
 
     <string name="pref_fullscreen_mode">Read in fullscreen</string>
 
@@ -61,6 +62,8 @@
     <string name="vertical_viewer">Vertical</string>
     <string name="webtoon_viewer">Webtoon (experimental)</string>
 
+    <string name="pref_download_directory">Downloads directory</string>
+
     <string name="accounts_login_title">Login for %1$s</string>
     <string name="username">Username</string>
     <string name="password">Password</string>
@@ -70,6 +73,8 @@
     <string name="success">Success</string>
     <string name="invalid_login">Login error</string>
     <string name="loading">Loading…</string>
+
+
     <string name="action_favorite">Add to favorites</string>
     <string name="action_remove_favorite">Remove from favorites</string>
     <string name="downloading">Downloading…</string>
@@ -80,13 +85,12 @@
     <string name="action_select_all">Select all</string>
     <string name="action_mark_as_read">Mark as read</string>
     <string name="action_mark_as_unread">Mark as unread</string>
+    <string name="action_download">Download</string>
     <string name="selected_chapters_title">Selected chapters: %1$d</string>
 
     <string name="notification_progress">Update progress: %1$d/%2$d</string>
     <string name="notification_completed">Update completed</string>
     <string name="notification_no_new_chapters">No new chapters found</string>
     <string name="notification_new_chapters">Found new chapters for:</string>
-    <string name="action_download">Download</string>
-
 
 </resources>

app/src/main/res/xml/pref_downloads.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orderingFromXml="true">
+
+</PreferenceScreen>

app/src/main/res/xml/pref_main.xml

@@ -6,6 +6,11 @@
         android:persistent="false"
         android:title="@string/pref_category_reader" />
 
+    <Preference
+        android:key="@string/pref_category_downloads_key"
+        android:persistent="false"
+        android:title="@string/pref_category_downloads" />
+    
     <Preference
         android:key="@string/pref_category_accounts_key"
         android:persistent="false"