message: Handled null bar button title
diff: @@ -125,7 +125,9 @@ public class BarButtonView extends ViewGroup implements CollapsibleActionView {
  void styleTitle() {
  if (menuItem != null && titleChanged) {
  - SpannableString titleSpannable = new SpannableString(title);
  + SpannableString titleSpannable = null;
  + if (title != null) {
  + titleSpannable = new SpannableString(title);
  if (fontFamily != null)
  titleSpannable.setSpan(new TypefaceSpan(fontFamily), 0, title.length(), 0);
  if (fontWeight != null)
  @@ -134,6 +136,7 @@ public class BarButtonView extends ViewGroup implements CollapsibleActionView {
  titleSpannable.setSpan(new StyleSpan(ReactTypefaceUtils.parseFontStyle(fontStyle)), 0, title.length(), 0);
  if (fontSize != null)
  titleSpannable.setSpan(new AbsoluteSizeSpan(fontSize, true), 0, title.length(), 0);
  + }
  menuItem.setTitle(titleSpannable);
  titleChanged = false;
  }
  