android9获取系统空间大小，剩余空间大小，总空间大小
洒家认为 结论先行``StorageStatsManager storageStatsManager = (StorageStatsManager)context.getSystemService(STORAGE_STATS_SERVICE); try { long totalBytes = storageStatsManager.getTotalBytes(StorageManager.UUID_DEFAULT);//总空间大小 long availBytes
