Add autoInitializeCamera prop (#505)

Author: slycoder

src/TwilioVideo.ios.js

@@ -150,6 +150,12 @@ export default class TwilioVideo extends Component {
  * @param {{ participant, room }} dominant participant
  */
  onDominantSpeakerDidChange: PropTypes.func,
+ /**
+ * Whether or not video should be automatically initialized upon mounting
+ * of this component. Defaults to true. If set to false, any use of the
+ * camera will require calling `_startLocalVideo`.
+ */
+ autoInitializeCamera: PropTypes.bool,
  ...View.propTypes
  }
 
@@ -162,7 +168,9 @@ export default class TwilioVideo extends Component {
 
  componentDidMount () {
  this._registerEvents()
- this._startLocalVideo()
+ if (this.props.autoInitializeCamera !== false) {
+ this._startLocalVideo()
+ }
  this._startLocalAudio()
  }