[Java] Make private method package scope.
[Java] Make private method package scope.

real-logic/Aeron,mikeb01/Aeron,galderz/Aeron,real-logic/Aeron,galderz/Aeron,oleksiyp/Aeron,EvilMcJerkface/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,oleksiyp/Aeron,mikeb01/Aeron,galderz/Aeron,oleksiyp/Aeron,mikeb01/Aeron,real-logic/Aeron,galderz/Aeron,EvilMcJerkface/Aeron,mikeb01/Aeron,EvilMcJerkface/Aeron