Extract mapping of RN Accessibility to UIA from DynamicAutomationPeer

[SavoySchuler]

Proposal: Extract mapping of RN Accessibility to UIA from DynamicAutomationPeer

Summary

Right now, DAP is the only control that reads out the RN accessibility properties we set and translates them into UIA properties. Views are the only things that use it. We would have to subclass all of our native controls to use DAP which is bad for perf.

Need to develop new story for custom automation peers for WinUI 3.0.

[chrisglein]

I believe this is the WinUI improvement that this is waiting on: microsoft/microsoft-ui-xaml#1349