RFR: 8315974: Make fields final in 'com.sun.crypto.provider' package [v3]

[Andrey Turbanov]

> A few classes in `com.sun.crypto.provider` package have non-final fields which could easily be marked `final`.

Andrey Turbanov has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - Merge remote-tracking branch 'origin/master' into final_fields_com.sun.crypto.provider
   
   # Conflicts:
   #	src/java.base/share/classes/com/sun/crypto/provider/PBKDF2KeyImpl.java
 - Merge remote-tracking branch 'origin/master' into final_fields_com.sun.crypto.provider
   
   # Conflicts:
   #	src/java.base/share/classes/com/sun/crypto/provider/PBEKeyFactory.java
 - 8315974: Make fields final in 'com.sun.crypto.provider' package
   
   apply review suggestions
 - [PATCH]: Make fields final in com.sun.crypto.provider package

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Changes: https://git.openjdk.org/jdk/pull/15412/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15412&range=02
  Stats: 117 lines in 31 files changed: 11 ins; 26 del; 80 mod
  Patch: https://git.openjdk.org/jdk/pull/15412.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15412/head:pull/15412

PR: https://git.openjdk.org/jdk/pull/15412