RFR: 8344865: SM cleanup in sun/reflect/annotation

[Roger Riggs]

Refactored doPrivileged and removed imports in sun.reflect.annotation classes:
AnnotationInvocationHandler, AnnotationParser, AnnotationSupport, and AnnotationType.

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Commit messages:
 - 8344865: SM cleanup in sun/reflect/annotation

Changes: https://git.openjdk.org/jdk/pull/22328/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22328&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344865
  Stats: 48 lines in 4 files changed: 0 ins; 33 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/22328.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22328/head:pull/22328

PR: https://git.openjdk.org/jdk/pull/22328