Android allowBackup

To enable or disable android app from being backed up or restored you can use AndroidManifest.xml file and android:allowBackup=”false” which if present and is set to false will prevent even a full-system backup that would otherwise cause all application data to be saved via adb. The default value of this attribute is true.  

Reference Link: http://www.appsdeveloperblog.com/enable-disable-android-app-backups-restore/