Add split-second-stopwatch exercise #2968#2977

jagdish-15 merged 11 commits intoexercism:mainexercism/java:mainfrom

EmmanuelBerkowicz:#2968-Add-split-second-stopwatch-exerciseEmmanuelBerkowicz/exercismjava:#2968-Add-split-second-stopwatch-exerciseCopy head branch name to clipboard