[Paginator] Allow 'All' option

#### Feature request

#### What is the expected behavior?
Ability to provide "ALL" as page size option.[5,10,50, All]

#### What is the current behavior?
Page size options are fixed numbers.[5,10,50]

#### What is the use-case or motivation for changing an existing behavior?
Most paginators offer this function, therefore user expects it.

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

Start by locating the Angular Material paginator implementation and its existing tests, then trace how page-size options are represented and rendered. The change is done when an All option can be supplied alongside numeric sizes and selecting it displays all items without breaking the current numeric options.

Written by the indexing model from the issue text.