Add beta update channel

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

@@ -14,7 +14,6 @@
         <item>@string/settings_su_app</item>
         <item>@string/settings_su_adb</item>
         <item>@string/settings_su_app_adb</item>
-
     </string-array>
 
     <string-array name="value_array">
@@ -73,4 +72,9 @@
         <item>@string/isolate_summary</item>
     </string-array>
 
+    <string-array name="update_channel">
+        <item>@string/settings_update_stable</item>
+        <item>@string/settings_update_beta</item>
+    </string-array>
+
 </resources>

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

@@ -151,6 +151,9 @@
     <string name="settings_hide_manager_summary">Temporarily hide Magisk Manager.\nThis will install a new app called \"Unhide Magisk Manager\"</string>
     <string name="language">Language</string>
     <string name="system_default">(System Default)</string>
+    <string name="settings_update_channel_title">Update Channel</string>
+    <string name="settings_update_stable">Stable</string>
+    <string name="settings_update_beta">Beta</string>
 
     <string name="settings_core_only_title">Magisk Core Only Mode</string>
     <string name="settings_core_only_summary">Enable only core features, all modules will not be loaded. MagiskSU, MagiskHide, and systemless hosts will still be enabled</string>

app/src/main/res/xml/app_settings.xml

@@ -15,6 +15,12 @@
             android:title="@string/settings_notification_title"
             android:summary="@string/settings_notification_summary" />
 
+        <ListPreference
+            android:key="update_channel"
+            android:title="@string/settings_update_channel_title"
+            android:entries="@array/update_channel"
+            android:entryValues="@array/value_array" />
+
         <Preference
             android:key="clear"
             android:title="@string/settings_clear_cache_title"