fix(autocomplete): panel blending in with background in high contrast mode (#11190)
fix(autocomplete): panel blending in with background in high contrast mode (#11190)

Fixes the autocomplete panel not being visible in high contrast mode, because it doesn't have a border and box shadows aren't being rendered.
jelbourn/material2,DevVersion/material2,mmalerba/material2,amcdnl/material2,amcdnl/material2,DevVersion/material2,DevVersion/material2,crisbeto/material2,andrewseguin/material2,andrewseguin/material2,josephperrott/material2,josephperrott/material2,ppham27/material2,andrewseguin/material2,josephperrott/material2,Jefiozie/material2,DevVersion/material2,crisbeto/material2,amcdnl/material2,ppham27/material2,Jefiozie/material2,angular/components,jelbourn/material2,andrewseguin/material2,josephperrott/material2,DevVersion/material2,Jefiozie/material2,mmalerba/material2,jelbourn/material2,Jefiozie/material2,crisbeto/material2,mmalerba/material2,crisbeto/material2,jelbourn/material2,angular/components,ppham27/material2,amcdnl/material2,mmalerba/material2,Jefiozie/material2,josephperrott/material2,ppham27/material2,angular/components,jelbourn/material2,andrewseguin/material2,mmalerba/material2,angular/components,ppham27/material2,amcdnl/material2