Refactor TextLayoutManager.isRTL() method

Summary:
Quick refactor of refactor TextLayoutManager.isRTL() method to cleanup the method and remove lint warning

changelog: [internal] internal

Reviewed By: javache

Differential Revision: D43888197

fbshipit-source-id: 779fb84527f95b3c04504eaa4302be55ab328634

ReactAndroid/src/main/java/com/facebook/react/views/text/TextLayoutManager.java

@@ -72,11 +72,12 @@ public class TextLayoutManager {
 
   public static boolean isRTL(ReadableMap attributedString) {
     ReadableArray fragments = attributedString.getArray("fragments");
-    for (int i = 0; i < fragments.size(); i++) {
-      ReadableMap fragment = fragments.getMap(i);
+    if (fragments != null && fragments.size() > 0) {
+      ReadableMap fragment = fragments.getMap(0);
       ReadableMap map = fragment.getMap("textAttributes");
-      return TextAttributeProps.getLayoutDirection(map.getString(ViewProps.LAYOUT_DIRECTION))
-          == LayoutDirection.RTL;
+      return map != null
+          && TextAttributeProps.getLayoutDirection(map.getString(ViewProps.LAYOUT_DIRECTION))
+              == LayoutDirection.RTL;
     }
     return false;
   }