Apply correct text attributes in TextInput.setTextAndSelection

Summary:
Changelog: [internal]

Make sure correct text attributes are used inside of view command.

Reviewed By: sshic

Differential Revision: D29585943

fbshipit-source-id: 4748c843ff586f1dd42f3a89460afb624f9b371a

React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputComponentView.mm

@@ -421,11 +421,9 @@ using namespace facebook::react;
   }
   _comingFromJS = YES;
   if (![value isEqualToString:_backedTextInputView.attributedText.string]) {
-    NSMutableAttributedString *mutableString =
-        [[NSMutableAttributedString alloc] initWithAttributedString:_backedTextInputView.attributedText];
-    [mutableString replaceCharactersInRange:NSMakeRange(0, _backedTextInputView.attributedText.length)
-                                 withString:value];
-    [self _setAttributedString:mutableString];
+    NSAttributedString *attributedString =
+        [[NSAttributedString alloc] initWithString:value attributes:_backedTextInputView.defaultTextAttributes];
+    [self _setAttributedString:attributedString];
     [self _updateState];
   }