requestPolicyExchange: Test Staleness of Result instead of the Operation?

[ajtosh77]

I wonder if it would make more sense for requestPolicyExchange to run after the cacheExchange, and instead of comparing the staleness of the operation--compare the staleness of the result.

For example, I have a query that returns a list of activities. I also have a query that returns a particular activity by id. These are different operations, so even if the activity query gets a cache hit (from not-stale-data obtained via the activities list query) the call still get upgraded to cache-and-network.

Thoughts?