
This adds two methods that are helpful when working with Futures. One is a version of postOrRun that can indicate completion by a Future and the other is a simplified version of Guava's Futures.transformAsync (which can't be used as it's in Beta). PiperOrigin-RevId: 461896598 (cherry picked from commit 1df79419d8a9120d7e36432a1984dd790ba082b6)