feat(cdk/a11y): Add new API goldens

Author: zelliott

tools/public_api_guard/cdk/a11y.d.ts

@@ -186,6 +186,25 @@ export interface Highlightable extends ListKeyManagerOption {
     setInactiveStyles(): void;
 }
 
+export declare const INPUT_MODALITY_DETECTOR_DEFAULT_OPTIONS: InputModalityDetectorOptions;
+
+export declare const INPUT_MODALITY_DETECTOR_OPTIONS: InjectionToken<InputModalityDetectorOptions>;
+
+export declare type InputModality = 'keyboard' | 'mouse' | 'touch' | null;
+
+export declare class InputModalityDetector implements OnDestroy {
+    get inputModality(): InputModality;
+    readonly inputModalityChange: Observable<InputModality>;
+    constructor(platform: Platform, document: Document, options?: InputModalityDetectorOptions);
+    ngOnDestroy(): void;
+    static ɵfac: i0.ɵɵFactoryDef<InputModalityDetector, [null, null, { optional: true; }]>;
+    static ɵprov: i0.ɵɵInjectableDef<InputModalityDetector>;
+}
+
+export interface InputModalityDetectorOptions {
+    ignoreKeys?: string[];
+}
+
 export declare class InteractivityChecker {
     constructor(_platform: Platform);
     isDisabled(element: HTMLElement): boolean;
@@ -266,4 +285,6 @@ export interface RegisteredMessage {
     referenceCount: number;
 }
 
+export declare const TIME_AFTER_TOUCH_MS = 650;
+
 export declare const TOUCH_BUFFER_MS = 650;