title: noCompress "tflite" does not work with noCompress "pb"
body: <p>I use tensorflow mobile and lite on Android,assets contains model.pb and model2.tflite,build.gradle:</p>
  
  <pre><code>android {
       ...
       aaptOptions {
           noCompress "tflite"
           noCompress "pb"
       }
  }
  
  dependencies {
       ...
       implementation 'org.tensorflow:tensorflow-android:1.13.1'
       implementation 'org.tensorflow:tensorflow-lite:2.1.0'
       implementation 'org.tensorflow:tensorflow-lite-gpu:2.1.0'
  }
  </code></pre>
  
  <p>When I run this code:</p>
  
  <pre><code>val fileDescriptor = context.assets.openFd(modelFile)
  </code></pre>
  
  <p>console logs:<code>java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed</code>,pb is work.
  When I remove <code>noCompress "pb"</code>,tflite is work.
  device: simulator Android10 and Samsung8 9
  Why,Can you help me?Thank you.</p>