Input's FormControl setValue does not work when mat-form-field has chip-list and input is linked to autocomplete

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

#### What is the expected behavior?
Input's FormControl's setValue should work for an input that is inside a mat-form-field that has both autocomplete and chip-list.

#### What is the current behavior?
FormControl setValue does not work when the following iff a mat-form-field has an input that has matAutocomplete AND the mat-form-field has a mat-chip-list.

SetValue works if one removes the matAutocomplete directive from the input or removes the mat-chip-list element.

#### What are the steps to reproduce?
Demo should have the input incrementing a number every second, which doesn't work:

https://stackblitz.com/edit/angular-ay3yts?file=app%2Fautocomplete-simple-example.html

Deleting mat-chip-list or removing the matAutocomplete directive fixes the issue.

#### What is the use-case or motivation for changing an existing behavior?
I want to be able to programmatically add a chip then clear the input when an option in the autocomplete has been selected.

#### Which versions of Angular, Material, OS, TypeScript, browsers are affected?
Angular: 5.2.4
Material: 5.2.4

#### Is there anything else we should know?
Nope :)

リンクされている StackBlitz の再現手順、特に app/autocomplete-simple-example.html から始め、matAutocomplete と mat-chip-list の両方が存在する状態で例を実行します。その組み合わせで input FormControl の setValue が更新されない理由を追跡します。完了条件は、autocomplete と chip-list の動作を利用できるまま、プログラムによる更新が機能することです。

索引モデルが issue の本文から書いたものです。