title: @react-native-community/voice or react-native-voice / voice gives exception java.lang.NullPointerException at com.wenkesj.voice.VoiceModule.onResults
body: <p><a href="https://www.npmjs.com/package/@react-native-community/voice?activeTab=readme" rel="nofollow noreferrer">@react-native-community/voice</a> was working smoothly but recently it gives following error</p>
  <pre><code>java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.Iterator java.util.ArrayList.iterator()' on a null object reference
      at com.wenkesj.voice.VoiceModule.onResults(VoiceModule.java:347)
      at android.speech.SpeechRecognizer$InternalListener$1.handleMessage(SpeechRecognizer.java:457)
      at android.os.Handler.dispatchMessage(Handler.java:106)
      at android.os.Looper.loop(Looper.java:201)
      at android.app.ActivityThread.main(ActivityThread.java:6810)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
  </code></pre>