Patch: Integrate async-profiler

[Vladimir Sitnikov]

Alexey>the indenting style is 4 spaces
Alexey>Star imports turned to explicit imports

What do you think of committing .editorconfig file so the editors set
indent size and similar options automatically?
For example,

[*.java]
trim_trailing_whitespace = true
insert_final_newline = true
charset = utf-8
indent_style = space
indent_size = 4
tab_width = 4
max_line_length = 100

Vladimir