RFR: 8314199: Initial size PBEKeyFactory#validTypes is not up-to-date

[Kevin Driver]

fixes [JDK-8314199](https://bugs.openjdk.org/browse/JDK-8314199) by initializing the HashSet with a more accurate number

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Commit messages:
 - fixes JDK-8314199 by initializing the HashSet with a more accurate number

Changes: https://git.openjdk.org/jdk/pull/16103/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16103&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314199
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16103.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16103/head:pull/16103

PR: https://git.openjdk.org/jdk/pull/16103