…ss (facebook#49377)

Summary:

ReactAccessibilityDelegate exists to handle much of the accessibility tasks in the various Views in RN. There is quite a bit of text specific logic, mostly related to virtual views and nested links within a TextView. 

I decided to subclass this into a TextView-specific version because I need this delegate to reference TextView or ReactClickableSpan, which live under `react/views` while ReactAccessibilityDelegate live under `react/uimanager`. The former depends on the latter, so making the latter depend on the former would for a dependency cycle that would break builds. I thought about making a separate package for this but both `react/views` and `react/uimanager` need to include ReactAccessibilityDelegate so we would still have a cycle.

mAccessibilityLinks is only set on ReactTextViewManager, so this is purely a text thing. Subclassing is not the most ideal as it extends the inheritance chain some more but I do not see a better option.

Differential Revision: D69499115

Summary:
Whenever we remove a link in some text we do not properly update the accessibility delegate to respond to this change. As a result we still think that there are nodes to access around the spans

Changelog: [Android][Fixed] - Fix text link accessibility on state update removal

Reviewed By: NickGerleman

Differential Revision: D69551906

…ok#49381)

Summary:

A much improved version of my previous attempt in D68306316 (facebook#48773).

Instead of LinkMovementMethod which makes TextViews scrollable if they overflow, this implementation uses `ExploreByTouchHelper`'s `onVirtualViewKeyboardFocusChanged` and `onPerformActionForVirtualView` to handle focus changes and clicks on virtual views (aka spans in our case). This impl will correctly ellipsize text and allow tab to nav through the links.

Differential Revision: D69551206