[crac] RFR: 8354514: [CRaC] Remove new methods from AbstractInterruptibleChannel and SocketImpl

[Radim Vansa]

Fix errors in JCK due to newly exposed methods.

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Commit messages:
 - 8354514: [CRaC] Remove new methods from AbstractInterruptibleChannel and SocketImpl

Changes: https://git.openjdk.org/crac/pull/222/files
  Webrev: https://webrevs.openjdk.org/?repo=crac&pr=222&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354514
  Stats: 63 lines in 6 files changed: 39 ins; 18 del; 6 mod
  Patch: https://git.openjdk.org/crac/pull/222.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/222/head:pull/222

PR: https://git.openjdk.org/crac/pull/222