fix(toggle): add checked getter to not make breaking change

Author: adisreyaj

projects/components/src/toggle-switch/toggle-switch.component.ts

@@ -48,6 +48,10 @@ export class ToggleSwitchComponent implements ControlValueAccessor {
   @Output()
   public readonly checkedChange: EventEmitter<boolean> = new EventEmitter();
 
+  public get checked() {
+    return this.isChecked;
+  }
+
   public isChecked: boolean = false;
   public isDisabled: boolean = false;