Pupil-24 Absence of backing up favorites feature

app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~     Pupil, Hitomi.la viewer for Android
+  ~     Copyright (C) 2019  tom5079
+  ~
+  ~     This program is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     This program is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU General Public License
+  ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-path name="external" path="/"/>
+</paths>

app/src/main/res/xml/root_preferences.xml

@@ -74,6 +74,14 @@
             app:title="@string/settings_nomedia_title"
             app:summary="@string/settings_nomedia_title"/>
 
+        <Preference
+            app:key="backup"
+            app:title="@string/settings_backup_title"/>
+
+        <Preference
+            app:key="restore"
+            app:title="@string/settings_restore_title"/>
+
     </PreferenceCategory>
 
 </androidx.preference.PreferenceScreen>