feat(core): first class a11y support (#8909)

packages/core/accessibility/index.d.ts

@@ -0,0 +1,36 @@
+import { View } from '../ui/core/view';
+import { AndroidAccessibilityEvent } from './accessibility-types';
+
+export * from './accessibility-common';
+export * from './accessibility-types';
+export * from './font-scale';
+
+/**
+ * Initialize accessibility for View. This should be called on loaded-event.
+ */
+export function setupAccessibleView(view: View): void;
+
+/**
+ * Update accessibility properties on nativeView
+ */
+export function updateAccessibilityProperties(view: View): void;
+
+/**
+ * Android helper function for triggering accessibility events
+ */
+export function sendAccessibilityEvent(View: View, eventName: AndroidAccessibilityEvent, text?: string): void;
+
+/**
+ * Update the content description for android views
+ */
+export function updateContentDescription(View: View, forceUpdate?: boolean): string | null;
+
+/**
+ * Is Android TalkBack or iOS VoiceOver enabled?
+ */
+export function isAccessibilityServiceEnabled(): boolean;
+
+/**
+ * Find the last view focused on a page.
+ */
+export function getLastFocusedViewOnPage(page: Page): View | null;