RFR: JMC-7155: [JFR Writer] Complete the annotation handling code

[Jaroslav Bachorik]

JMC-7155: [JFR Writer] Complete the annotation handling code

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Commit messages:
 - JMC-7155: [JFR Writer] Complete the annotation handling code

Changes: https://git.openjdk.java.net/jmc/pull/222/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=222&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7155
  Stats: 534 lines in 19 files changed: 425 ins; 74 del; 35 mod
  Patch: https://git.openjdk.java.net/jmc/pull/222.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/222/head:pull/222

PR: https://git.openjdk.java.net/jmc/pull/222