新增单位列表查询

common/src/main/ets/db/dao/DwInfoDao.ets

 import relationalStore from '@ohos.data.relationalStore';
 import { DwInfo } from '../../entity/DwInfo';
-import { Logger } from '../../utils/Logger';
 import BaseTable, { ValueType } from '../BaseTable';
 import { Table } from '../decorator/Decorators';
-import { BaseSql } from '../sql/BaseSql';
 
 /**
  * 单位的数据层