Update local view mirroring (#314)

Author: slycoder

ios/RCTTWVideoModule.m

@@ -108,6 +108,10 @@ - (dispatch_queue_t)methodQueue {
 
 - (void)addLocalView:(TVIVideoView *)view {
  [self.localVideoTrack addRenderer:view];
+ [self updateLocalViewMirroring:view];
+}
+
+- (void)updateLocalViewMirroring:(TVIVideoView *)view {
  if (self.camera && self.camera.device.position == AVCaptureDevicePositionFront) {
  view.mirror = true;
  }
@@ -161,6 +165,9 @@ - (void)addParticipantView:(TVIVideoView *)view sid:(NSString *)sid trackSid:(NS
  TVIVideoFormat *startFormat,
  NSError *error) {
  if (!error) {
+ for (TVIVideoView *renderer in self.localVideoTrack.renderers) {
+ [self updateLocalViewMirroring:renderer];
+ }
  [self sendEventCheckingListenerWithName:cameraDidStart body:nil];
  }
  }];