Resubmit #24714 and fixes kvo crash (#24840)

Summary:
Resubmit #24714.
From the #24714 (comment), seems it would crash sometimes. JoshuaGross Hi :) I added a method to let `UITextField` call the cleanup explicitly. Please check again, thanks!

## Changelog

[iOS] [Fixed] - Fixes selection of single line text input
Pull Request resolved: #24840

Differential Revision: D15415793

Pulled By: JoshuaGross

fbshipit-source-id: 2bb32aa8a1fd8fad116177aac760509649c4a423

Libraries/Text/TextInput/Singleline/RCTUITextField.m

@@ -176,6 +176,16 @@ - (CGRect)editingRectForBounds:(CGRect)bounds
 
 #pragma mark - Overrides
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
+// Overrides selectedTextRange setter to get notify when selectedTextRange changed.
+- (void)setSelectedTextRange:(UITextRange *)selectedTextRange
+{
+  [super setSelectedTextRange:selectedTextRange];
+  [_textInputDelegateAdapter selectedTextRangeWasSet];
+}
+#pragma clang diagnostic pop
+
 - (void)setSelectedTextRange:(UITextRange *)selectedTextRange notifyDelegate:(BOOL)notifyDelegate
 {
   if (!notifyDelegate) {