title: Angular Slide Toggle is always enabled with formControlName attribute
body: <p>I am trying to use mat slide toggle compoment from Angular Material but, when I try to initialize the slider with a default value with the [checked] attribute, no matter what is in this field the slider is always checked.</p>
  <pre><code>&lt;mat-slide-toggle color=&quot;primary&quot; [checked]=&quot;false&quot; formControlName=&quot;{{input.id}}&quot;&gt;&lt;/mat-slide-toggle&gt;
  </code></pre>
  <p>Any idea ?</p>
  <p>Thanks in advance,</p>
  <p>Nicolas</p>