Migrate ShareSheet from js to ts

Summary: Migrated ShareSheet.js to ShareSheet.tsx

Reviewed By: jknoxville

Differential Revision: D16734361

fbshipit-source-id: a6c050be19892f1650c1652536a62e4324ad949a

src/reducers/application.tsx

@@ -267,3 +267,12 @@ export const setFlipperRating = (rating: number): Action => ({
     rating,
   },
 });
+
+export const unsetShare = (): Action => ({
+  type: UNSET_SHARE,
+});
+
+export const setExportStatusComponent = (payload: JSX.Element): Action => ({
+  type: SET_EXPORT_STATUS_MESSAGE,
+  payload,
+});