title: "Your app contains unsafe cryptographic encryption patterns" - How I can get rid of this warning?
body: <p>Few days ago, In "Pre-launch report for APK" in Google Play Console, it start to flag me</p>
  
  <pre><code>Unsafe encryption
  
  Detected in APK ???
  
  Your app contains unsafe cryptographic encryption patterns. Please see this Google Help Centre article for details.
  
  Vulnerable classes:
  
  c.j.a.s.J.b
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/x0n0u.png" rel="noreferrer"><img src="https://i.stack.imgur.com/x0n0u.png" alt="enter image description here"></a></p>
  
  <hr>
  
  <p>However, since the early day of APK, I do not change anything in encryption code/ description code. Hence, I'm not sure why Google starts to warn me on recent APK?</p>
  
  <p>Any idea how to resolve? As, the information for vulnerable classes <code>c.j.a.s.J.b</code> is not helpful. </p>
  
  <p>I try to use Proguard + mapping.txt to retrace <code>c.j.a.s.J.b</code> but able to figure what class is that.</p>
  
  <p>Any idea how I can get rid of Google security warning?</p>