Restore Mappers.java from working version f79eed5

Author: baich110

app/src/main/java/com/example/simplereader/pipeline/Mappers.java

@@ -24,7 +24,7 @@ public Feedback mapToFeedback(@Nullable Performance.EventId eventId,
             @Nullable AccessibilityEvent event,
             @Nullable Interpretation interpretation,
             @Nullable AccessibilityNodeInfoCompat sourceNode) {
-        if (interpretation == null || interpretation == Interpretation.NO_CHANGE) return null;
+        if (interpretation == null || interpretation == Interpretation.EMPTY) return null;
         Object tag = interpretation.tag();
         if (tag == null) return null;
         String tagStr = tag.toString();