message: Implemented test id prop on segmented tab item
  Copied over the existing code but accessibilityElements was empty. So changed to use subviews instead
diff: @@ -16,6 +16,9 @@ using namespace facebook::react;
  @end
  @implementation NVSegmentedTabComponentView
  +{
  + NSArray<NSString *> *_testIDs;
  +}
  - (instancetype)initWithFrame:(CGRect)frame
  {
  @@ -43,9 +46,24 @@ using namespace facebook::react;
  }
  _segmentedControl.selectedSegmentIndex = selectedIndex;
  }
  + NSMutableArray<NSString *> *testIDArr = [[NSMutableArray alloc] init];
  + for (auto i = 0; i < newViewProps.testIDs.size(); i++) {
  + NSString *key = [[NSString alloc] initWithUTF8String: newViewProps.testIDs[i].c_str()];
  + [testIDArr addObject:key];
  + }
  + _testIDs = [testIDArr copy];
  [super updateProps:props oldProps:oldProps];
  }
  +- (void)layoutSubviews
  +{
  + [super layoutSubviews];
  + for (int i = 0; i < _segmentedControl.numberOfSegments; i++) {
  + UIView *segment = _segmentedControl.subviews[_segmentedControl.subviews.count - i - 1];
  + segment.subviews[0].accessibilityIdentifier = _testIDs[i];
  + }
  +}
  +
  - (NVTabBarPagerComponentView *)getTabBarPager
  {
  for(NSInteger i = 0; i < [self.superview subviews].count; i++) {
  