fix SpeakerPhone switch for mobile. (#312)

* fix SpeakerPhone switch for mobile.

* update.

lib/src/track/audio_management.dart

@@ -1,5 +1,6 @@
 import 'package:synchronized/synchronized.dart' as sync;
 
+import '../hardware/hardware.dart';
 import '../logger.dart';
 import '../support/native.dart';
 import '../support/native_audio.dart';
@@ -23,6 +24,9 @@ ConfigureNativeAudioFunc onConfigureNativeAudio =
 
 final _trackCounterLock = sync.Lock();
 AudioTrackState _audioTrackState = AudioTrackState.none;
+
+AudioTrackState get audioTrackState => _audioTrackState;
+
 int _localTrackCount = 0;
 int _remoteTrackCount = 0;
 
@@ -141,7 +145,9 @@ Future<NativeAudioConfiguration> defaultNativeAudioConfigurationFunc(
         AppleAudioCategoryOption.allowBluetooth,
         AppleAudioCategoryOption.mixWithOthers,
       },
-      appleAudioMode: AppleAudioMode.videoChat,
+      appleAudioMode: Hardware.instance.preferSpeakerOutput
+          ? AppleAudioMode.videoChat
+          : AppleAudioMode.voiceChat,
     );
   }
 

lib/src/track/options.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/foundation.dart' show kIsWeb;
 
-import 'package:flutter_webrtc/flutter_webrtc.dart';
-
+import '../support/platform.dart';
 import '../track/local/audio.dart';
 import '../track/local/video.dart';
 import '../types/video_parameters.dart';
@@ -132,10 +131,10 @@ class ScreenShareCaptureOptions extends VideoCaptureOptions {
   @override
   Map<String, dynamic> toMediaConstraintsMap() {
     var constraints = super.toMediaConstraintsMap();
-    if (useiOSBroadcastExtension && WebRTC.platformIsIOS) {
+    if (useiOSBroadcastExtension && lkPlatformIs(PlatformType.iOS)) {
       constraints['deviceId'] = 'broadcast';
     }
-    if (WebRTC.platformIsDesktop) {
+    if (lkPlatformIsDesktop()) {
       if (deviceId != null) {
         constraints['deviceId'] = {'exact': deviceId};
       }