deny any google app backup

Author: zoff99

android-refimpl-app/app/src/main/AndroidManifest.xml

@@ -68,13 +68,15 @@
     <application
         android:name=".MainApplication"
         android:allowBackup="false"
+        android:fullBackupContent="false"
+        android:dataExtractionRules="@xml/data_extraction_rules"
         android:icon="@mipmap/ic_launcher4"
         android:roundIcon="@mipmap/ic_launcher4_round"
         android:label="TRIfA"
         android:supportsRtl="true"
         android:requestLegacyExternalStorage="false"
         android:theme="@style/AppTheme"
-        tools:replace="android:allowBackup,android:label">
+        tools:replace="android:allowBackup,android:fullBackupContent,android:label">
 
         <activity
             android:name=".StartMainActivityWrapper"

android-refimpl-app/app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup>
+        <exclude domain="root" />
+        <exclude domain="file" />
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+        <exclude domain="external" />
+    </cloud-backup>
+    <device-transfer>
+        <exclude domain="root" />
+        <exclude domain="file" />
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+        <exclude domain="external" />
+    </device-transfer>
+</data-extraction-rules>