title: Obfuscate the SharedPreferences XML file through an update of an already published app without breaking it
body: <p>The app in context was my first app, and I was quite naive to store some sensitive info (ads related) using SharedPrefences. Is there a way to obfuscate the XML file without breaking the app?</p>
  
  <p>The app has already been published, and is used by a lot of users.</p>