Add Brick factory to generate bricks

app/src/main/java/brickbreaker/Ball.java

app/src/main/java/brickbreaker/GameComponents/Brick.java

...java/brickbreaker/GameComponents/DefaultBrickFactory.java

app/src/main/java/brickbreaker/GameMapBuilder.java

app/src/main/java/brickbreaker/GamePanel.java

app/src/main/java/brickbreaker/Interfaces/BrickFactory.java

app/src/main/java/brickbreaker/Interfaces/GameObserver.java