RFR: 8333308: javap --system handling doesn't work on internal class names

[Sonia Zaldana Calles]

Hi all, 

This PR addresses [JDK-8333308](https://bugs.openjdk.org/browse/JDK-8333308) enabling `javap -system` to handle internal class names. 

Thanks, 
Sonia

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Commit messages:
 - 8333308: javap --system handling doesn't work on internal class names

Changes: https://git.openjdk.org/jdk/pull/19883/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19883&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333308
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19883.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19883/head:pull/19883

PR: https://git.openjdk.org/jdk/pull/19883