Import files from jdk-21.0.1-ga

List of files:
  ojluni/src/main/java/java/util/AbstractList.java
  ojluni/src/main/java/java/util/AbstractMap.java
  ojluni/src/main/java/java/util/AbstractSequentialList.java
  ojluni/src/main/java/java/util/ArrayDeque.java
  ojluni/src/main/java/java/util/ArrayList.java
  ojluni/src/main/java/java/util/Collections.java
  ojluni/src/main/java/java/util/Deque.java
  ojluni/src/main/java/java/util/HashMap.java
  ojluni/src/main/java/java/util/HashSet.java
  ojluni/src/main/java/java/util/LinkedHashMap.java
  ojluni/src/main/java/java/util/LinkedHashSet.java
  ojluni/src/main/java/java/util/LinkedList.java
  ojluni/src/main/java/java/util/List.java
  ojluni/src/main/java/java/util/NavigableMap.java
  ojluni/src/main/java/java/util/NavigableSet.java
  ojluni/src/main/java/java/util/ReverseOrderDequeView.java
  ojluni/src/main/java/java/util/ReverseOrderListView.java
  ojluni/src/main/java/java/util/ReverseOrderSortedMapView.java
  ojluni/src/main/java/java/util/ReverseOrderSortedSetView.java
  ojluni/src/main/java/java/util/SortedMap.java
  ojluni/src/main/java/java/util/SortedSet.java
  ojluni/src/main/java/java/util/TreeMap.java
  ojluni/src/main/java/java/util/TreeSet.java
  ojluni/src/main/java/java/util/Vector.java
  ojluni/src/main/java/java/util/concurrent/ConcurrentSkipListMap.java
  ojluni/src/main/java/java/util/concurrent/ConcurrentSkipListSet.java
  ojluni/src/main/java/java/util/concurrent/CopyOnWriteArrayList.java
  ojluni/src/main/java/jdk/internal/util/ArraysSupport.java
  ojluni/src/test/java/util/SequencedCollection/Basic.java
  ojluni/src/test/java/util/SequencedCollection/BasicMap.java
  ojluni/src/test/java/util/SequencedCollection/SimpleDeque.java
  ojluni/src/test/java/util/SequencedCollection/SimpleList.java
  ojluni/src/test/java/util/SequencedCollection/SimpleSortedMap.java
  ojluni/src/test/java/util/SequencedCollection/SimpleSortedSet.java
  ojluni/src/main/java/java/util/AbstractCollection.java

Generated by tools/expected_upstream/ojluni_merge_to_main.py

Bug: 320460092
Test: N/A
No-Typo-Check: Imported files
Change-Id: I9ed8448174144599be0c8bba60aed7c6060e0f31