Summary:
Added examples to RNTester for the AccessibilityInfo API for:
1. SetAccessibilityFocus()
2. isReduceMotionEnabled()
3. iOS Only
a. isBoldTextEnabled()
b. isGrayScaleEnabled()
c. isInvertColorsEnabled()
d. isReduceTransparencyEnabled()
## Changelog
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[General] [Added] - Add new examples to the Accessibility API page
Pull Request resolved: https://github.com/facebook/react-native/pull/30379
Test Plan: 
Reviewed By: TheSavior
Differential Revision: D25245329
Pulled By: rickhanlonii
fbshipit-source-id: e9c11c775410075199b4e1011b3dac0acd972e89
Summary:
Fixes https://github.com/facebook/react-native/issues/30325
After the RNTester redesign, a style started globally caching screen width. This isn't needed, but means that width is incorrect if the device is rotated, or a window is resized. Rely on default layout which will be 100% width instead.
## Changelog
<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://github.com/facebook/react-native/wiki/Changelog
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[Internal] [Fixed] - Fix RNTester Not Resizing Examples on Rotation/Resize
Pull Request resolved: https://github.com/facebook/react-native/pull/30376
Test Plan: Tested viewing an example and rotating the device in iOS simulator
Reviewed By: rickhanlonii
Differential Revision: D25098642
Pulled By: appden
fbshipit-source-id: 9acdb656da7de9fda05f6091b36f8d9aa2155524
Summary:
This PR tries to remove the code duplication between `RNTesterApp.ios.js` and `RNTesterApp.android.js`. The common code has been moved to `RNTesterAppShared.js`.
This PR also refactors the state architecture and simplifies it to use just one single `useReducer` hook to manage the app's state.
It also adds the visibility hack to make the screen change a little bit faster and removed the unneeded test files.
Pull Request resolved: https://github.com/facebook/react-native/pull/29777
Reviewed By: cpojer
Differential Revision: D23349302
Pulled By: rickhanlonii
fbshipit-source-id: ce0d7b03e6ef65b1655bcb744817b73c5144438b
Su Min Kim
Nick Gerleman
Ankit Tiwari
