add backup rules

Author: codehasan

app/src/main/AndroidManifest.xml

@@ -11,11 +11,12 @@
     <application
         android:name=".App"
         android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:resizeableActivity="true"
         android:roundIcon="@mipmap/ic_launcher_round"
-        android:supportsPictureInPicture="true"
         android:theme="@style/BaseTheme">
 
         <activity

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

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content />

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

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup />
+    <device-transfer />
+</data-extraction-rules>