CrOS: Use NetworkState in delay_network_call.cc (Take 2)

NetworkPortalDetector::CaptivePortalStatus is being deprecated.
This removes the dependency from delay_network_call.cc and uses
NetworkState::connection_state instead.

Original CL:
https://chromium-review.googlesource.com/c/chromium/src/+/5434847

BUG=b:331264838
TEST=unit_tests, browser_tests, ash_unittests, chromeos_unittests

Change-Id: I61befd7869a73b70b906e79a550c25a5dfac254d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5460260


Reviewed-by: Danila Kuzmin <dkuzmin@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1289314}