[faciledictu]

Summary:

Fixes #59816.

ViewShadowNode::initialize keeps a host view for only a few accessibility props (accessible, accessibilityViewIsModal, accessibilityLiveRegion and three more). iOS and Android also read several others from a view that is not an accessibility element, and they are lost when the view is flattened:

• accessibilityLabel: TalkBack reads it from the container; an accessible ancestor builds its label from its subviews.
• accessibilityRole / role and accessibilityState: the TabBar trait on iOS; heading, checkable and the state on Android.
• accessibilityActions, onAccessibilityEscape, onAccessibilityMagicTap: iOS passes them to the elements inside or sends them up the hierarchy.
• accessibilityShowsLargeContentViewer, accessibilityIgnoresInvertColors: they apply to the subviews on iOS.

This change keeps the view when any of them is set, as #59335 did for accessibilityLiveRegion. The old architecture kept these views too.

Left out on purpose: accessibilityHint, accessibilityLanguage and accessibilityValue, which are not read from a container, and aria-busy / aria-checked="mixed": on Android they go into contentDescription and replace the children's text (a separate bug), so a kept view would be read as "busy".

Changelog:

[GENERAL] [FIXED] - A View with accessibilityLabel, role, accessibilityState, accessibilityActions, onAccessibilityEscape or another accessibility prop read from a container is no longer flattened

Test Plan:

• Fantom (View-itest.js): the does not unflatten view tests for accessibilityLabel, accessibilityRole and accessibilityActions asserted the bug and are now unflattens view (the accessibilityActions one also checked the wrong prop). Added: role and aria-checked unflatten, aria-busy and aria-checked="mixed" do not. The iOS-only props are not in the view config Fantom uses. The rest of the suite passes, except 9 LogBoxInspector* snapshot tests that fail the same way on main (93019c4).
• On devices, with https://github.com/faciledictu/rn-a11y-flattening-repro and 0.88.0 built from source with this change backported, each flattened View now matches its collapsable={false} control (the results without the change are in Fabric flattens a View whose accessibility props iOS and Android read from a container: label, role, state, actions, escape #59816):
  • Android, the accessibility nodes on a device: sections 1, 2, 3, 6, 7, 8 and 13.
  • iOS simulator, Accessibility Inspector: sections 2, 3, 4, 5, 6 and 10 (the label "Close dialog P1" instead of "× P1", the Archive action, the Large Content Viewer, Smart Invert).
  • iPhone, VoiceOver: the tab is read as "Tab K1, tab, 1 of 2", and escape runs its own wrapper's handler, not the other dialog's.