[jdk17u-dev] RFR: 8071693: Introspector ignores default interface methods

[Goetz Lindenmaier]

I backport this for parity with 17.0.14-oracle.

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Commit messages:
 - Backport 1e4eafb4fe70832294a12938d93e7860073cf4cf

Changes: https://git.openjdk.org/jdk17u-dev/pull/2849/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2849&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8071693
  Stats: 247 lines in 2 files changed: 243 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2849.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2849/head:pull/2849

PR: https://git.openjdk.org/jdk17u-dev/pull/2849