slide toggle programatic changing of checked value is not working

[alexw10]

Bug, feature request, or proposal:

I believe I found a bug where when changing the [checked] value is not working.

What is the expected behavior?

Changing the [checked] value should propagate through the component.

What is the current behavior?

When changing the [checked] value inside of the (change) output it does not get updated throughout the slide-toggle component.

What are the steps to reproduce?

Providing a StackBlitz reproduction is the best way to share your issue.

StackBlitz starter: https://goo.gl/wwnhMV

See:
https://stackblitz.com/edit/angular-auatm8?file=app%2Fslide-toggle-configurable-example.ts

Take a look at the console.log when clicking the slide-toggle component:

#change ngOnInit false
Angular is running in the development mode. Call enableProdMode() to enable the production mode.
#change initial: false true true
expecting the slide toggle to be toggled-off (false), but it sets to toggled-on (true)
#change final: false true true

What is the use-case or motivation for changing an existing behavior?

Want users to be able to confirm the change/negate it.

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

See the stackblitz