RN: Persist Asynchronously Consumed Events in Pressability

Summary:
There are a few places in `Pressability` where we asynchronously consume the `event` object.

Most places do not encounter any problems because the actual properties on `event` are seldom used.

Nonetheless, we should fix these gaps.

Changelog:
[General][Fixed] - Fix invalid `event` objects from `onPressOut` in certain cases

Reviewed By: rickhanlonii

Differential Revision: D21657126

fbshipit-source-id: e28d825b85d25602427beaf0bd603d22eaa5960a

Author: yungsters

Libraries/Pressability/Pressability.js

@@ -573,6 +573,7 @@ export default class Pressability {
                     this._config.delayHoverIn,
                   );
                   if (delayHoverIn > 0) {
+                    event.persist();
                     this._hoverInDelayTimeout = setTimeout(() => {
                       onHoverIn(event);
                     }, delayHoverIn);
@@ -593,6 +594,7 @@ export default class Pressability {
                     this._config.delayHoverOut,
                   );
                   if (delayHoverOut > 0) {
+                    event.persist();
                     this._hoverInDelayTimeout = setTimeout(() => {
                       onHoverOut(event);
                     }, delayHoverOut);
@@ -729,6 +731,7 @@ export default class Pressability {
         normalizeDelay(this._config.delayPressOut),
       );
       if (delayPressOut > 0) {
+        event.persist();
         this._pressOutDelayTimeout = setTimeout(() => {
           onPressOut(event);
         }, delayPressOut);