Set dataExtractionRules in AndroidManifest for Android 12+

app/src/main/AndroidManifest.xml

@@ -17,7 +17,8 @@
         android:name=".AegisApplication"
         android:allowBackup="true"
         android:fullBackupOnly="true"
-        android:fullBackupContent="@xml/backup_rules"
+        android:fullBackupContent="@xml/backup_rules_old"
+        android:dataExtractionRules="@xml/backup_rules"
         android:backupAgent=".AegisBackupAgent"
         android:icon="@mipmap/${iconName}"
         android:label="Aegis"

app/src/main/res/xml/backup_rules.xml

@@ -1,5 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<full-backup-content>
-    <include domain="sharedpref" path="."/>
-    <include domain="file" path="backup/aegis.json"/>
-</full-backup-content>
+<data-extraction-rules>
+    <cloud-backup>
+        <include domain="sharedpref" path="."/>
+        <include domain="file" path="backup/aegis.json"/>
+    </cloud-backup>
+    <device-transfer>
+        <include domain="sharedpref" path="."/>
+        <include domain="file" path="backup/aegis.json"/>
+    </device-transfer>
+</data-extraction-rules>

app/src/main/res/xml/backup_rules_old.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content>
+    <include domain="sharedpref" path="."/>
+    <include domain="file" path="backup/aegis.json"/>
+</full-backup-content>