Add hardware api for camera, audio input/output selection. (#147)

* chore: Add hardware api for device settings dialog, camera preview, audio input/output selection.

* update.

* update flutter-webrtc.

* chore: add popupmenu for audio/video selection.

* chore: Improve menu tooltip text.

* Removed hardware settings dialog, added it to experimental branch.

* remove unused code.

* Respond to device changes.

* fixed `flutter analyze`.

* update.

* bump verion to v1.1.1.

lib/src/track/local/video.dart

@@ -81,4 +81,16 @@ extension LocalVideoTrackExt on LocalVideoTrack {
       options.copyWith(cameraPosition: position),
     );
   }
+
+  Future<void> switchCamera(String deviceId) async {
+    final options = currentOptions;
+    if (options is! CameraCaptureOptions) {
+      logger.warning('Not a camera track');
+      return;
+    }
+
+    await restartTrack(
+      options.copyWith(deviceId: deviceId),
+    );
+  }
 }