Summary:
Changelog:
[Internal][Added] - Change signature of `addTimestamp` for IPerformanceLogger and rename old implementation to addTimeAnnotation
Adding this because there is no current ability to add a timespan to our perf logging with pre-defined start and end timestamps. The naming is a bit confusing because the current implementation of `addTimespan` in FB doesn't add a timespan, it adds an annotation of duration. We rename the old implementation to `addTimeAnnotation/s` and update `addTimespan` to suit our needs.
Reviewed By: rubennorte
Differential Revision: D22633202
fbshipit-source-id: 0e32099241f1f3835257cbb4ad108a4f437869e6