Proper attributed strings comparsion in RCTBaseTextInputView

Summary:
Now, in the new model, we transfer text attributes with actual text via attributed text to a native text component,
so previous text-only comparsion is not sufficient anymore.

Depends on D6600685.

Differential Revision: D6809833

fbshipit-source-id: 475b7426cf3c6694781790d99ef32466606da2f2

Libraries/Text/TextInput/RCTBaseTextInputView.m

@@ -102,7 +102,7 @@ - (void)setAttributedText:(NSAttributedString *)attributedText
 {
   NSInteger eventLag = _nativeEventCount - _mostRecentEventCount;
 
-  if (eventLag == 0 && ![attributedText.string isEqualToString:self.backedTextInputView.attributedText.string]) {
+  if (eventLag == 0 && ![attributedText isEqualToAttributedString:self.backedTextInputView.attributedText]) {
     UITextRange *selection = self.backedTextInputView.selectedTextRange;
     NSInteger oldTextLength = self.backedTextInputView.attributedText.string.length;