Works only with Android now!
activate() method create android speechRecognizer and ask permission for android 6+ version. Do not forget to add uses-permission android:name="android.permission.RECORD_AUDIO" permission to manifest
Listen method start listening your voice, and send result as List of Strings
When you call cancel, recognition canceled
Call when you need to stop speechRecognition and destroy it
When you call stop, recognition stopped and send result as List of String