Summary:
In iOS 13, Apple made a change that results in video URLs returned by UIImagePickerController becoming invalidated as soon as the info object from the delegate callback is released. This commit works around this issue by retaining these info objects by default and giving the application a way to release them once it is done processing the video.
See also https://stackoverflow.com/questions/57798968/didfinishpickingmediawithinfo-returns-different-url-in-ios-13
Reviewed By: olegbl, mmmulani
Differential Revision: D17845889
fbshipit-source-id: 12d0e496508dafa2581ef12730f7537ef98c60e2