[Refactoring] Bubble Game refactoring

0. GameTimer : start,stop,reset,...functions are not package-private
			   Unable to access outside of [org.pjhjohn.framework.main]
1. BUnitLine refactored : delete redundent containerSize, etc.
2. BubbleView : delete not-used code stuff

[COMMENT]
1. BUnitLine : Try not to use hard-coding(hot-wired) such like 7, 8