Summary:
This diff generalises computation of the currently selected plugin, app, device etc. and adds this information to all the analytics events and error reports.
Slicing of events by os, device, app or selected plugin can be very useful. This is especially true for errors which often affects only certain types of devices, e.g. android only or physical devices only. Having such information can help to narrow down such issues.
Reviewed By: passy
Differential Revision: D28511441
fbshipit-source-id: ed9dc57927c70ed8cc6fe093e21604eae54c2f60
25ae4a0535