Summary:
Refactors `AccessibilityInfo` so that it does not reimplement the event listener logic that is already implemented in `EventEmitter` (which backs the implementation of `RCTDeviceEventEmitter`).
This also means that calling `AccessibilityInfo.removeEventListener` will correctly display a deprecation error, due to `EventEmitter.removeListener` being deprecated. In a future release, both of these methods will be removed.
Changelog:
[General][Deprecated] - Deprecate `AccessibilityInfo.removeEventListener`.
Reviewed By: kacieb
Differential Revision: D27574340
fbshipit-source-id: 98c71d9c1470018df0f1526cc2f349aac842e786