Proposal: StateFlow.asWorkflow() extension

[zach-klippenstein]

StateFlow<T> is a stream of values that always has a "current" value, and emits that value to all new subscribers. This is conceptually similar to a Workflow<Unit, T, T>.

[rjrjr]

Whoa.

[dhavalshreyas]

@bencochran did something similar with SignalProducer here: https://github.com/square/workflow/compare/bc/guwt-prototype?expand=1#diff-4c4c01e02da8afc7c83f4c4858c545e5

[zach-klippenstein]

Interesting, that's slightly different. We only have converters for turning Flows into Workers, not Workflows.