fix(material-experimental/mdc-slide-toggle): update adapter to match new interface (#18124)

The `MDCSwitchAdapter` was changed in the most-recent canary release which is breaking the CI check.

Author: crisbeto

package.json

@@ -54,7 +54,7 @@
     "@types/youtube": "^0.0.38",
     "@webcomponents/custom-elements": "^1.1.0",
     "core-js": "^2.6.9",
-    "material-components-web": "5.0.0-canary.c6808c51c.0",
+    "material-components-web": "5.0.0-canary.b602226ce.0",
     "rxjs": "^6.5.3",
     "systemjs": "0.19.43",
     "tslib": "^1.10.0",

src/material-experimental/mdc-slide-toggle/slide-toggle.ts

@@ -95,6 +95,9 @@ export class MatSlideToggle implements ControlValueAccessor, AfterViewInit, OnDe
     removeClass: className => this._switchElement.nativeElement.classList.remove(className),
     setNativeControlChecked: checked => this._checked = checked,
     setNativeControlDisabled: disabled => this._disabled = disabled,
+    setNativeControlAttr: (name, value) => {
+      this._inputElement.nativeElement.setAttribute(name, value);
+    }
   };
 
   /** Whether the slide toggle is currently focused. */