RFR: JDK-8323684: TypeMirror.{getAnnotationsByType, getAnnotation} return uninformative results [v3]

[Joe Darcy]

> Initial implementation to make TypeMirror.{getAnnotationsByType, getAnnotation} functional; tests to follow.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Implement review feedback on regression test.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17410/files
  - new: https://git.openjdk.org/jdk/pull/17410/files/37711749..9717a54c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17410&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17410&range=01-02

  Stats: 25 lines in 1 file changed: 10 ins; 11 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/17410.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17410/head:pull/17410

PR: https://git.openjdk.org/jdk/pull/17410