Send NavigationButtonPressed event also on Swipe-Back on screen

[markdevocht]

In Android the RNN.NavigationButtonPressed event is send when tapping the back button and when swiping back on the screen, this was not the case in iOS.

We are now sending this event also on Swipe-back gesture and is turned OFF by default.

The sending of the event is controlled by an options flag called: navigationButtonEventOnSwipeBack
and should be send like this:

Navigation.push(this.props.componentId, {
      component: {
        name: SCREEN_NAME,
        options: {
          topBar: {
            backButton: {
              popStackOnPress: false
            }
          },
          hardwareBackButton: {
            popStackOnPress: false,
            dismissModalOnPress: false
          },

navigationButtonEventOnSwipeBack: true

      },
       passProps
}