RFR: 8370839: Tests to verify peculiar Proxy dispatching behaviors [v4]

[Chen Liang]

> java.lang.reflect.Proxy has some surprising behaviors associated with protected methods in Object, covariant/contravariant overrides in interfaces, and package-private types in method signatures. Such behaviors should have tests, so that they are not accidentally perturbed in Proxy updates.

Chen Liang has updated the pull request incrementally with one additional commit since the last revision:

  Update test/jdk/java/lang/reflect/Proxy/BridgeMethodsTest.java

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28023/files
  - new: https://git.openjdk.org/jdk/pull/28023/files/3b8c6d2a..e8ed5fab

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28023&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28023&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28023.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28023/head:pull/28023

PR: https://git.openjdk.org/jdk/pull/28023