FrameCapture: Handle context Reset with no calls The code was assuming that setDefaultResetCalls adds reset calls for an entry point, but it has logic for skipping if the current state is already default. This CL checks to see if we added any calls for the entry point before trying to iterate through them. Test: Flip capture Bug: b/308208067 Change-Id: I8a214b0eb0df068d6b3172c0ca1406f6751f91ea Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5114271 Reviewed-by: Mike Schuchardt <mikes@lunarg.com> Commit-Queue: Cody Northrop <cnorthrop@google.com>