title: Type `libcore.io.Memory` was not found while generating signed apk in android studio
body: <p>There's a pro-guard rule inside <code>proguard-rules.pro</code> file as: </p>
  
  <pre><code>-keepresourcexmlelements manifest/application/meta-data@value=GlideModule
  </code></pre>
  
  <p>I removed that line as mentioned by someone <a href="https://github.com/bumptech/glide/issues/1331#issuecomment-243689501" rel="noreferrer">here</a>.</p>
  
  <p>Then again I got an error as:</p>
  
  <blockquote>
    <p>can't find referenced class
    org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement</p>
  </blockquote>
  
  <p>Then I tried this code mentioned by someone <a href="https://stackoverflow.com/a/37745414/9211918">here</a>.</p>
  
  <p>After Trying the mentioned code there's now another error as:</p>
  
  <pre><code>Type `libcore.io.Memory` was not found, it is required for default or static interface methods desugaring of `void com.google.android.gms.internal.ads.auh$a.a(long, byte)`
  Message{kind=WARNING, text=Type `libcore.io.Memory` was not found, it is required for default or static interface methods desugaring of `void com.google.android.gms.internal.ads.auh$a.a(long, byte)`, sources=[D:\Wallprix\Wallprix\app\build\intermediates\transforms\proguard\release\0.jar], tool name=Optional.of(D8)}
  </code></pre>
  
  <p>Please help me to fix this error as I don't know what should I implement now.</p>
  
  <p>Details: </p>
  
  <ol>
  <li><p>I'm using Glide Module</p></li>
  <li><p>I've implemented Admob Interstitial code</p></li>
  <li><p>Getting error while generating signed APK but not when testing App
  on a real device.</p></li>
  </ol>