RFR: 8341006: Optimize StackMapGenerator detect frames [v2]

[Shaojin Wen]

> 1. Construct Frames directly without BitSet
> 2. Use Frame[] instead of ArrayList
> 3. Use EMPTY_FRAME_ARRAY for initialization. No need to allocate objects when there is no frame.

Shaojin Wen has updated the pull request incrementally with one additional commit since the last revision:

  copyright

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21183/files
  - new: https://git.openjdk.org/jdk/pull/21183/files/0ea67959..905acdda

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21183&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21183&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21183.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21183/head:pull/21183

PR: https://git.openjdk.org/jdk/pull/21183