Update AIPlayer.java

onStreak(board) checks to see if this player has any recent hits, and returns an integer value based off of the results.
Returns:
1 = prevMove.isHit(board) && !prevMove2.isHit(board)
2 = prevMove.isHit(board) && prevMove2.isHit(board)
3 = prevMove2.isHit(board)
0 = No previous hits to work with.

This integer is then used in playerFire() switch statement to help determine next move selection.