check list validity bit

Author: tianchen92

java/vector/src/main/java/org/apache/arrow/vector/complex/FixedSizeListVector.java

@@ -526,6 +526,10 @@ public boolean equals(int index, ValueVector to, int toIndex) {
 
     FixedSizeListVector that = (FixedSizeListVector) to;
 
+    if (this.isSet(index) != that.isSet(toIndex)) {
+      return false;
+    }
+
     for (int i = 0; i < listSize; i++) {
       if (!vector.equals(index * listSize + i, that, toIndex * listSize + i)) {
         return false;

java/vector/src/main/java/org/apache/arrow/vector/complex/ListVector.java

@@ -435,6 +435,11 @@ public boolean equals(int index, ValueVector to, int toIndex) {
     }
 
     ListVector that = (ListVector) to;
+
+    if (this.isSet(index) != that.isSet(toIndex)) {
+      return false;
+    }
+
     final int leftStart = offsetBuffer.getInt(index * OFFSET_WIDTH);
     final int leftEnd = offsetBuffer.getInt((index + 1) * OFFSET_WIDTH);