Release Striped.custom publicly.

Fixes #1893
(and also useful for #2514)

RELNOTES=`util.concurrent`: Added `Striped.custom`.
PiperOrigin-RevId: 803457130

Author: cpovirk

android/guava/src/com/google/common/util/concurrent/Striped.java

@@ -192,8 +192,9 @@ public Iterable<L> bulkGet(Iterable<? extends Object> keys) {
    * @param stripes the minimum number of stripes (locks) required
    * @param supplier a {@code Supplier<L>} object to obtain locks from
    * @return a new {@code Striped<L>}
+   * @since NEXT
    */
-  static <L> Striped<L> custom(int stripes, Supplier<L> supplier) {
+  public static <L> Striped<L> custom(int stripes, Supplier<L> supplier) {
     return new CompactStriped<>(stripes, supplier);
   }
 

guava/src/com/google/common/util/concurrent/Striped.java

@@ -192,8 +192,9 @@ public Iterable<L> bulkGet(Iterable<? extends Object> keys) {
    * @param stripes the minimum number of stripes (locks) required
    * @param supplier a {@code Supplier<L>} object to obtain locks from
    * @return a new {@code Striped<L>}
+   * @since NEXT
    */
-  static <L> Striped<L> custom(int stripes, Supplier<L> supplier) {
+  public static <L> Striped<L> custom(int stripes, Supplier<L> supplier) {
     return new CompactStriped<>(stripes, supplier);
   }