Use GrowableBitSet for PerTestRecorder.One

In PerTestRecorder.One - wrap 'coverage' and coverageShortcut into a helper class

set() method - if index is out of bounds then it shall resize 'coverage' BitSet and 'coverageShortcut' array

refactor PerTestRecorder.Any, None, One, Many to top-level classes

refactor ThreadVisibilityStrategy to top-level class

write unit tests for
ThreadVisibilityStrategy.SingleThreaded
ThreadVisibilityStrategy.Synchronized
ThreadVisibilityStrategy.Volatile