RFR: 8314199: Initial size PBEKeyFactory#validTypes is not up-to-date [v2]

[Kevin Driver]

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

Kevin Driver has updated the pull request incrementally with one additional commit since the last revision:

  use a Set per code review comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16103/files
  - new: https://git.openjdk.org/jdk/pull/16103/files/96bdb279..a8521b6b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16103&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16103&range=00-01

  Stats: 26 lines in 1 file changed: 1 ins; 2 del; 23 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