feat(mat-selection-list): add slide toggle as alternative for checkbox

#### Bug, feature request, or proposal:
feature request

#### What is the expected behavior?
Option lists can have slide toggles instead of checkboxes, as you can see on Android OS.

#### What is the current behavior?
Option lists are only for checkboxes and if you want to create something that has the same look but has a slide toggle instead, you will have to implement by yourself.

#### What is the use-case or motivation for changing an existing behavior?
Its a very common option list format, very used on Android 5~6.

#### Which versions of Angular, Material, OS, TypeScript, browsers are affected?
Material 5.1

#### Is there anything else we should know?
You can find it in Material's guidelines:
*(switches are very cute btw)*

Cute sidebar example:
*(inspired by Twitter's PWA, achieved with slide-toggle, mat-list and `::ng-deep`, that's a lot more than I expect to write)*

首先检查 mat-selection-list 和 slide-toggle 组件，以及当前 option-list checkbox 行为的暴露方式。当 option lists 支持将 slide toggles 作为一种替代呈现方式，同时保留预期的选择行为，并为新选项提供覆盖时，这项工作就完成了。

由索引模型根据 Issue 内容生成。