Accept updated declaration file.

Author: nickwalther

tools/public_api_guard/cdk/a11y.d.ts

@@ -79,6 +79,8 @@ export declare class EventListenerFocusTrapInertStrategy implements FocusTrapIne
     preventFocus(focusTrap: ConfigurableFocusTrap): void;
 }
 
+export declare const FOCUS_MONITOR_GLOBAL_OPTIONS: InjectionToken<Partial<FocusMonitorOptions>>;
+
 export declare const FOCUS_TRAP_INERT_STRATEGY: InjectionToken<FocusTrapInertStrategy>;
 
 export interface FocusableOption extends ListKeyManagerOption {
@@ -92,19 +94,26 @@ export declare class FocusKeyManager<T> extends ListKeyManager<FocusableOption &
 }
 
 export declare class FocusMonitor implements OnDestroy {
-    constructor(_ngZone: NgZone, _platform: Platform);
+    constructor(_ngZone: NgZone, _platform: Platform, globalFocusMonitorOptions?: Partial<FocusMonitorOptions>);
     _onBlur(event: FocusEvent, element: HTMLElement): void;
     focusVia(element: HTMLElement, origin: FocusOrigin, options?: FocusOptions): void;
     focusVia(element: ElementRef<HTMLElement>, origin: FocusOrigin, options?: FocusOptions): void;
     monitor(element: HTMLElement, checkChildren?: boolean): Observable<FocusOrigin>;
     monitor(element: ElementRef<HTMLElement>, checkChildren?: boolean): Observable<FocusOrigin>;
+    monitor(element: HTMLElement, options?: FocusMonitorOptions): Observable<FocusOrigin>;
+    monitor(element: ElementRef<HTMLElement>, options?: FocusMonitorOptions): Observable<FocusOrigin>;
     ngOnDestroy(): void;
     stopMonitoring(element: HTMLElement): void;
     stopMonitoring(element: ElementRef<HTMLElement>): void;
     static ɵfac: i0.ɵɵFactoryDef<FocusMonitor>;
     static ɵprov: i0.ɵɵInjectableDef<FocusMonitor>;
 }
 
+export interface FocusMonitorOptions {
+    checkChildren: boolean;
+    detectionWindow: number | 'indefinite';
+}
+
 export interface FocusOptions {
     preventScroll?: boolean;
 }