[jdk11u-dev] RFR: 8067651: LevelTransitionTest.java, fix trivial methods levels logic

[Amos Shi]

Backport of [JDK-8067651](https://bugs.openjdk.org/browse/JDK-8067651)
- Clean Backport
- Test Succeeded in local Dev Apple M1 Laptop

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Commit messages:
 - Backport 3c276ce1fec17ed0238cc977320f2c82965fc45b

Changes: https://git.openjdk.org/jdk11u-dev/pull/2373/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2373&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8067651
  Stats: 120 lines in 3 files changed: 71 ins; 40 del; 9 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2373.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2373/head:pull/2373

PR: https://git.openjdk.org/jdk11u-dev/pull/2373