RFR: 8202056: Expand serial warning to check for bad overloads of serial-related methods and ineffectual fields

[Joe Darcy]

This is an initial PR for expanded lint warnings done under two bugs:

8202056: Expand serial warning to check for bad overloads of serial-related methods and ineffectual fields
8160675: Issue lint warning for non-serializable non-transient instance fields in serializable type

to get feedback on the general approach and test strategy before further polishing the implementation.

The implementation initially started as an annotation processor I wrote several years ago. The refined version being incorporated into Attr has been refactored, had its checks expanded, and been partially ported to idiomatic javac coding style rather than using the javax.lang.model API from annotation processing.

Subsequent versions of this PR are expected to move the implementation closer to idiomatic javac, in particular to use javac flags rather than javax.lang.model.Modifier's. Additional resources keys will be defined for the serialization-related fields and methods not having the expected modifiers, types, etc. The resource keys for the existing checks related to serialVersionUID and reused.

Please also review the corresponding CSRs:

https://bugs.openjdk.java.net/browse/JDK-8274335
https://bugs.openjdk.java.net/browse/JDK-8274336

Informative serialization-related warning messages must take into account whether a class, interface, annotation, record, and enum is being analyzed. Enum classes and record classes have special handling in serialization. This implementation under review has been augmented with checks for interface types recommended by Chris Hegarty in an attachment on 8202056.

The JDK build has the Xlint:serial check enabled. The build did not pass with the augmented checks. For most modules, this PR contains the library changes necessary for the build to pass. I will start separate PRs in those library areas to get the needed SuppressWarning("serial") or other changes in place. For one module, I temporarily disabled the Xlint:serial check.

In terms of performance, I have not done benchmarks of the JDK build with and without these changes, but informally the build seems to take about as long as before.

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Commit messages:
 - Appease jcheck
 - Implement checks chegar recommended for interfaces.
 - Update comment.
 - Add tests for instance field checks.
 - Clean build with instance field checks in place.
 - Merge branch 'master' into JDK-8202056
 - Put Externalizable checks last.
 - Add checks for constructor access in Serializable classes.
 - Add no-arg ctor check for Externalizable classes.
 - Improve Externalization warnings.
 - ... and 19 more: https://git.openjdk.java.net/jdk/compare/5756385c...d498ff5f

Changes: https://git.openjdk.java.net/jdk/pull/5709/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5709&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8202056
  Stats: 1519 lines in 79 files changed: 1511 ins; 1 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5709.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5709/head:pull/5709

PR: https://git.openjdk.java.net/jdk/pull/5709