fix(inputs): fix aria with shadow-dom (#16329)

core/src/components/fab-button/fab-button.tsx

@@ -94,6 +94,7 @@ export class FabButton implements ComponentInterface {
     const inList = hostContext('ion-fab-list', this.el);
     return {
       'ion-activatable': true,
+      'aria-disabled': this.disabled ? 'true' : null,
       class: {
         ...createColorClasses(this.color),
         'fab-button-in-list': inList,