[lworld] RFR: 8244711: [lworld] Javac needs to tweak checks for interface implementation by an inline type.

[Srikanth Adayapalam]

When javac needs to check if a class implements a particular interface, it should
check if the reference projection of the class is a subtype of the interface. (Rather
than checking if the concerned class is a subtype of the interface)

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Commit messages:
 - 8244711: Javac needs to tweak checks for interface implementation by an inline type.

Changes: https://git.openjdk.java.net/valhalla/pull/41/files
 Webrev: https://webrevs.openjdk.java.net/valhalla/41/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8244711
  Stats: 178 lines in 9 files changed: 167 ins; 4 del; 7 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/41.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/41/head:pull/41

PR: https://git.openjdk.java.net/valhalla/pull/41