[android] look around the wifi sid and sort it by the signal

Key Point:This paper describes how to use the wifimanager type of access systemWifiService and access to all information about wifi around it via getscanresults, includingSsidI'm not sure what i'm talking about. It provides a small demo showing how to do the data obtainedSortAnd display with emphasis on accessing wifi operationsPermissionsIt's important。