refactor: disable backup

app/src/main/AndroidManifest.xml

@@ -25,7 +25,8 @@
 
     <application
         android:name=".GudariWalletApplication"
-        android:allowBackup="true"
+        android:allowBackup="false"
+        android:dataExtractionRules="@xml/data_extraction_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"

app/src/main/res/xml/data_extraction_rules.xml

@@ -1,19 +1,27 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-   Sample data extraction rules file; uncomment and customize as necessary.
-   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
-   for details.
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Rules for Android 12+ (API 31+) controlling:
+      - cloudBackup: Auto Backup to Google Drive
+      - deviceTransfer: Device-to-device transfers (e.g. phone setup wizard)
+
+    Since android:allowBackup="false" was set previously, we disable both.
 -->
 <data-extraction-rules>
-    <cloud-backup>
-        <!-- TODO: Use <include> and <exclude> to control what is backed up.
-        <include .../>
-        <exclude .../>
-        -->
+
+    <cloud-backup disableIfNoEncryptionCapabilities="false">
+        <exclude domain="root" />
+        <exclude domain="file" />
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+        <exclude domain="external" />
     </cloud-backup>
-    <!--
+
     <device-transfer>
-        <include .../>
-        <exclude .../>
+        <exclude domain="root" />
+        <exclude domain="file" />
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+        <exclude domain="external" />
     </device-transfer>
-    -->
+
 </data-extraction-rules>