Make emptyList public and mark the public EMPTY field as deprecated.

PiperOrigin-RevId: 495154966

java/core/src/main/java/com/google/protobuf/LazyStringArrayList.java

@@ -67,12 +67,17 @@ public class LazyStringArrayList extends AbstractProtobufList<String>
     EMPTY_LIST.makeImmutable();
   }
 
-  static LazyStringArrayList emptyList() {
+  /** Returns an empty immutable {@code LazyStringArrayList} instance */
+  public static LazyStringArrayList emptyList() {
     return EMPTY_LIST;
   }
 
-  // For compatibility with older runtimes.
+  /**
-  public static final LazyStringList EMPTY = EMPTY_LIST;
+   * For compatibility with older runtimes.
+   *
+   * @deprecated use {@link emptyList()} instead
+   */
+  @Deprecated public static final LazyStringList EMPTY = EMPTY_LIST;
 
   private final List<Object> list;