added send functionality to icon.

mobile/app/lib/util/speech_to_text.dart

@@ -3,15 +3,15 @@ import 'package:speech_to_text/speech_to_text.dart' as stt;
 
 /// Handles standard Speech-To-Text using on-device processing.
 class SpeechToText {
-  final stt.SpeechToText _speechToText = stt.SpeechToText();
-  bool _speechEnabled = false;
+  final stt.SpeechToText speechToText = stt.SpeechToText();
+  bool speechEnabled = false;
   String text = "";
 
   // Check if speech recognition is enabled.
-  bool isSpeechEnabled() => _speechEnabled;
+  bool isSpeechEnabled() => speechEnabled;
 
   Future<String> getTextWhenReady() async {
-    await _speechToText.stop();
+    await speechToText.stop();
     return text;
   }
 
@@ -22,22 +22,22 @@ class SpeechToText {
   void reset() => text = "";
 
   /// Start a speech recognition session
-  void _startListening() async => await _speechToText.listen(onResult: _onSpeechResult);
+  void startListening() async => await speechToText.listen(onResult: onSpeechResult);
 
   /// Manually stop the active speech recognition session
   /// Note that there are also timeouts that each platform enforces
   /// and the SpeechToText plugin supports setting timeouts on the
   /// listen method.
-  void _stopListening() async => await _speechToText.stop();
+  void stopListening() async => await speechToText.stop();
 
   SpeechToText() {
-    _initSpeech();
+    initSpeech();
   }
 
   /// This has to happen only once per app
-  void _initSpeech() async => _speechEnabled = await _speechToText.initialize();
+  void initSpeech() async => speechEnabled = await speechToText.initialize();
 
   /// This is the callback that the SpeechToText plugin calls when
   /// the platform returns recognized words.
-  void _onSpeechResult(SpeechRecognitionResult result) => text = result.recognizedWords;
+  String onSpeechResult(SpeechRecognitionResult result) => (text = result.recognizedWords);
 }