Summary:
Changes `usePressability` so that it accepts a nullable `config` argument.
This makes it possible for a component to use `usePressability` and lazily allocate the `config` and subsequent instance of `Pressability`. This can be useful for components that are commonly allocated but seldom pressed because it lets many usages of `usePressability` avoid allocating many extraneous objects.
Changelog:
[Internal]
Reviewed By: kacieb
Differential Revision: D23708206
fbshipit-source-id: 4a5063067131ce8c957fb16c49a2045e8c0b19fa
Tim Yung
9da4d87798