title: Works in debug but not in release | expo-av | react-native-unimodules
body: <h2>Environment</h2>
  
  <p>Expo CLI 3.11.1 environment info:
      System:
        OS: Windows 10
      Binaries:
        Yarn: 1.22.4 - C:\Users\user\AppData\Roaming\npm\yarn.CMD
        npm: 6.12.0 - C:\Program Files\nodejs\npm.CMD
      IDEs:
        Android Studio: Version  3.6.0.0 AI-192.7142.36.36.6308749</p>
  
  <p><strong>React-native android on device</strong></p>
  
  <h1>Step to repro :</h1>
  
  <h2>1.</h2>
  
  <pre><code>npx react-native init ReactRelease --version 0.62.2
  npm install react-native-unimodules@0.9.0 --save 
  expo install expo-av
  </code></pre>
  
  <h2>2.</h2>
  
  <p>Configure your files according to the doc in each library</p>
  
  <h2>3.</h2>
  
  <p>Edit <strong>App.js</strong></p>
  
  <pre class="lang-js prettyprint-override"><code>import React, { Component } from 'react';
  import { Text, StyleSheet, View, Button, Alert } from 'react-native';
  import { Audio } from 'expo-av';
  import * as Permissions from 'expo-permissions';
  
  var audioObjectActions = new Audio.Sound();
  
  export default class App extends Component {
      constructor(props) {
          super(props);
  
          this.state = {};
      }
  
      async componentDidMount() {
          await Permissions.askAsync(Permissions.AUDIO_RECORDING);
          await Audio.setAudioModeAsync({
              staysActiveInBackground: true,
              allowsRecordingIOS: false,
              interruptionModeIOS: Audio.INTERRUPTION_MODE_IOS_DUCK_OTHERS,
              playsInSilentModeIOS: true,
              playThroughEarpieceAndroid: false,
              interruptionModeAndroid: Audio.INTERRUPTION_MODE_ANDROID_DUCK_OTHERS,
              shouldDuckAndroid: true
          });
      }
  
      async _playRandomAction() {
          try {
              audioObjectActions.setOnPlaybackStatusUpdate(this._onPlaybackStatusUpdateAction);
              await audioObjectActions.loadAsync(require('./assets/song_sound.m4a'));
              await audioObjectActions.playAsync();
          } catch (error) {
              Alert.alert('ERROR : ', '' + JSON.stringify(error));
          }
      }
  
      _onPlaybackStatusUpdateAction = async (playbackStatus) =&gt; {
          if (!playbackStatus.isLoaded) {
              // Update your UI for the unloaded state
              if (playbackStatus.error) {
                  console.log(`Encountered a fatal error during playback: ${playbackStatus.error}`);
                  // Send Expo team the error on Slack or the forums so we can help you debug!
              }
          } else {
              if (playbackStatus.didJustFinish &amp;&amp; !playbackStatus.isLooping) {
                  await audioObjectActions.stopAsync();
                  await audioObjectActions.unloadAsync();
              }
          }
      };
  
      render() {
          return (
              &lt;View style={styles.container}&gt;
                  &lt;Text&gt; Test Audio &lt;/Text&gt;
                  &lt;Button title="On joue le morceau" onPress={async () =&gt; this._playRandomAction()} /&gt;
              &lt;/View&gt;
          );
      }
  }
  
  const styles = StyleSheet.create({
      container: {
          flex: 1,
          justifyContent: 'center',
          alignItems: 'center',
          backgroundColor: '#555555'
      }
  });
  </code></pre>
  
  <h2>4.</h2>
  
  <p>Create assets folder and add song_sound.m4a like this :
  <img src="https://user-images.githubusercontent.com/47422165/79838852-ee61e880-83b3-11ea-8788-382b29e293f6.png" alt="bug"></p>
  
  <h2>5</h2>
  
  <p><strong>Connect your android device via USB</strong></p>
  
  <h2>Test in <strong>debug</strong> :</h2>
  
  <pre><code>//POWERSHELL 1
  npx react-native run-android   
  
  //POWERSHELL 2
  npm start 
  </code></pre>
  
  <h3>Behavior</h3>
  
  <p>Works perfectly : the sound is loaded and is played</p>
  
  <h2>Test in <strong>release</strong></h2>
  
  <pre><code>cd android 
  ./gradlew assembleRelease
  ./gradlew installRelease
  </code></pre>
  
  <h3>Behavior</h3>
  
  <p>The sound doesn't load and the error displayed is : </p>
  
  <pre><code>{
      "nativeStackAndroid":[],
      "userInfo":null,
      "message":"com.google.android.exoplayer2.upstream.FileDataSource$FileDataSourceException: java.io.FileNotFoundException: assets_song_sound: open fialed: ENOENT (No such file or directory)",
      "code":"E_LOAD_ERROR",
      "line": 18,
      "column": 1111,
      "sourceURL":"index.android.bundle"
  }
  </code></pre>
  
  <h1>What I want ?</h1>
  
  <p><strong>Just load and play an audio in release juste like in debug.</strong></p>