Fix MissingOverrideAnnotation: Add @OverRide to setLetterSpacing in ReactTextView

Summary:
Fixed MissingOverrideAnnotation lint error in ReactTextView.java.

Added Override annotation to setLetterSpacing() method which overrides a method from a superclass but was missing the annotation.

changelog: [internal] internal

Differential Revision: D95412892

Author: mdvacca

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/text/ReactTextView.java

@@ -579,6 +579,7 @@ public void setHyphenationFrequency(int hyphenationFrequency) {
     mShouldAdjustSpannableFontSize = true;
   }
 
+  @Override
   public void setLetterSpacing(float letterSpacing) {
     if (Float.isNaN(letterSpacing)) {
       return;