git: openjdk/jdk: 8315454: Add a way to create an immutable snapshot of a BitSet

[Per Minborg]

Changeset: f2922682
Author:    Per Minborg <pminborg at openjdk.org>
Date:      2023-09-05 06:43:00 +0000
URL:       https://git.openjdk.org/jdk/commit/f2922682688a40529df269e1551246ac8da5d7ee

8315454: Add a way to create an immutable snapshot of a BitSet

Co-authored-by: Claes Redestad <redestad at openjdk.org>
Reviewed-by: redestad

! src/java.base/share/classes/java/net/URLEncoder.java
+ src/java.base/share/classes/jdk/internal/util/ImmutableBitSetPredicate.java
+ test/jdk/java/util/BitSet/ImmutableBitSet.java