Implement fast dump

[pyricau]

Today, heap dump is slow and blocks the VM. https://github.com/KwaiAppTeam/KOOM showed that it can be done as fork and dump for a number of archectures, which is much faster.

Proposal: create a new set of modules for heap dumping. That way we separate the default android impl, the native fast impl amd the jvm impl. These modules should stand on their own, e.g. if someone just wants heap dumping.

The native libs for fast dump should probably not be included for a few default for a few releases. Some people want to keep binary size small.

[alhah]

Sorry for the late submission. Recently, we are busy with Spring Festival activities. Every Chinese Internet company is the busiest during the months around the Spring Festival. Later, I discussed with the company's legal team to obtain permission to release the code.

Please help to review my code

When dumping hprof with DumpWrapper, judge whether there is a fast-dump module through reflection, if it exists, call the JNI method, if it does not exist, follow the original logic

[pyricau]

Cool!

Can you open up a pull request against this repository? Then I can review and leave comments there (it's important to ensure proper CLA signing)

Oops I didn't realized that was done here: #2121

[pyricau]

This will be released as part of KOOM now that the API is pluggable. #2121 (comment)