chore: fix autocomplete test (#7743)
chore: fix autocomplete test (#7743)

Due to https://github.com/angular/material2/commit/9b4f4355bc89cb83295f10b8d1bea6ba3ab4d6d5#diff-295d2cf77570f5880fd0c828fe60c2c4 the `mat-disabled` class is no longer being added to the underline element.

The disabled class is now being added to the host element of the `mat-form-field` component.
amcdnl/material2,ChronosWS/material2,josephperrott/material2,tinayuangao/material2,mmalerba/material2,Eddman/material2,jelbourn/material2,Eddman/material2,ChronosWS/material2,Jefiozie/material2,amcdnl/material2,Eddman/material2,mmalerba/material2,Jefiozie/material2,emoralesb05/material2,Eddman/material2,jelbourn/material2,crisbeto/material2,josephperrott/material2,amcdnl/material2,tinayuangao/material2,DevVersion/material2,tinayuangao/material2,andrewseguin/material2,Jefiozie/material2,willshowell/material2,andrewseguin/material2,DevVersion/material2,jelbourn/material2,fairfaxmedia/material2,mmalerba/material2,josephperrott/material2,crisbeto/material2,ChronosWS/material2,ppham27/material2,willshowell/material2,crisbeto/material2,Jefiozie/material2,andrewseguin/material2,ppham27/material2,tinayuangao/material2,ppham27/material2,angular/components,amcdnl/material2,andrewseguin/material2,amcdnl/material2,ppham27/material2,emoralesb05/material2,fairfaxmedia/material2,josephperrott/material2,fairfaxmedia/material2,angular/components,DevVersion/material2,mmalerba/material2,DevVersion/material2,jelbourn/material2,ppham27/material2,willshowell/material2,emoralesb05/material2,mmalerba/material2,ChronosWS/material2,Jefiozie/material2,andrewseguin/material2,emoralesb05/material2,DevVersion/material2,fairfaxmedia/material2,angular/components,willshowell/material2,fairfaxmedia/material2,tinayuangao/material2,emoralesb05/material2,Eddman/material2,willshowell/material2,crisbeto/material2,angular/components,jelbourn/material2,josephperrott/material2