Added backup rules to backup user preferences for both A12 & above and A11 and lower

app/demo/debug/output-metadata.json

@@ -0,0 +1,20 @@
+{
+  "version": 3,
+  "artifactType": {
+    "type": "APK",
+    "kind": "Directory"
+  },
+  "applicationId": "com.example.samples.apps.nowinandroid.demo.debug",
+  "variantName": "demoDebug",
+  "elements": [
+    {
+      "type": "SINGLE",
+      "filters": [],
+      "attributes": [],
+      "versionCode": 1,
+      "versionName": "0.0.1",
+      "outputFile": "app-demo-debug.apk"
+    }
+  ],
+  "elementType": "File"
+}

app/src/main/AndroidManifest.xml

@@ -24,6 +24,8 @@
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:dataExtractionRules="@xml/backup_rules_12"
+        android:fullBackupContent="@xml/backup_rules"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Nia.Splash">

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

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2022 The Android Open Source Project
+  ~
+  ~   Licensed under the Apache License, Version 2.0 (the "License");
+  ~   you may not use this file except in compliance with the License.
+  ~   You may obtain a copy of the License at
+  ~
+  ~       https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~   Unless required by applicable law or agreed to in writing, software
+  ~   distributed under the License is distributed on an "AS IS" BASIS,
+  ~   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~   See the License for the specific language governing permissions and
+  ~   limitations under the License.
+  -->
+<full-backup-content>
+    <include domain="file" path="datastore/user_preferences.pb"
+        requireFlags="clientSideEncryption" />
+    <include domain="file" path="datastore/user_preferences.pb"
+        requireFlags="deviceToDeviceTransfer" />
+</full-backup-content>
+
+
+
+

app/src/main/res/xml/backup_rules_12.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2022 The Android Open Source Project
+  ~
+  ~   Licensed under the Apache License, Version 2.0 (the "License");
+  ~   you may not use this file except in compliance with the License.
+  ~   You may obtain a copy of the License at
+  ~
+  ~       https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~   Unless required by applicable law or agreed to in writing, software
+  ~   distributed under the License is distributed on an "AS IS" BASIS,
+  ~   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~   See the License for the specific language governing permissions and
+  ~   limitations under the License.
+  -->
+<data-extraction-rules>
+    <cloud-backup disableIfNoEncryptionCapabilities="true">
+        <include domain="file" path="datastore/user_preferences.pb"/>
+    </cloud-backup>
+    <device-transfer>
+        <include domain="file" path="datastore/user_preferences.pb"/>
+    </device-transfer>
+</data-extraction-rules>
+
+