add common method to conver int[] to Integer[]
add common method to conver int[] to Integer[]

Change-Id: I9f50caa81428771f0a34177255d09e08286e78da

BruceZu/sawdust,BruceZu/sawdust,BruceZu/KeepTry,BruceZu/KeepTry,BruceZu/KeepTry,BruceZu/sawdust,BruceZu/sawdust,BruceZu/KeepTry