localSDPOptions top-level constant Null safety

Implementation

const Map<String, dynamic> localSDPOptions = {
  'stereo': false,
  'mediaStream': null,
  'codec': 'h264',
  'simulcast': false,
  'scalabilityMode': null,
  'disableAudio': false,
  'disableVideo': false,
  'setSDPToPeer': true,
};