android 修改手机联电脑，内部存储大小
frameworks/av/media/mtp/MtpStorage.cppuint64_t MtpStorage::getMaxCapacity() { if (mMaxCapacity == 0) { struct statfs stat; if (statfs(getPath(), &stat)) return -1; mMaxCapacity = (uint64_t)stat.f_blocks *
