Explicitly list Table<..., @nullable V> as a supertype of ArrayTable.

That way, when the rendered Javadoc lists `Table` under "All implemented interfaces," it lists it with `@Nullable` on the type argument.

Currently, Javadoc does not include `@Nullable` because we explicitly declare only `extends ArrayTable<R, C, @nullable V>`, where `ArrayTable` in turn `implements Table<R, C, V>`. That is not enough for Javadoc because Java doesn't know how substitution works for arbitrary custom type systems. (I think this relates to [JDK-8042981](https://bugs.openjdk.org/browse/JDK-8042981).)

RELNOTES=n/a
PiperOrigin-RevId: 794648642

Author: cpovirk

android/guava/src/com/google/common/collect/ArrayTable.java

@@ -89,9 +89,11 @@
  * @author Jared Levy
  * @since 10.0
  */
+// We explicitly list `implements Table<...>` so that its `@Nullable V` appears in Javadoc.
+@SuppressWarnings("RedundancyRemover")
 @GwtCompatible
 public final class ArrayTable<R, C, V> extends AbstractTable<R, C, @Nullable V>
-    implements Serializable {
+    implements Table<R, C, @Nullable V>, Serializable {
 
   /**
    * Creates an {@code ArrayTable} filled with {@code null}.

guava/src/com/google/common/collect/ArrayTable.java

@@ -90,9 +90,11 @@
  * @author Jared Levy
  * @since 10.0
  */
+// We explicitly list `implements Table<...>` so that its `@Nullable V` appears in Javadoc.
+@SuppressWarnings("RedundancyRemover")
 @GwtCompatible
 public final class ArrayTable<R, C, V> extends AbstractTable<R, C, @Nullable V>
-    implements Serializable {
+    implements Table<R, C, @Nullable V>, Serializable {
 
   /**
    * Creates an {@code ArrayTable} filled with {@code null}.