Update header includes for /base/functional in /apps and /ash

bind.h, callback.h, callback_forward.h, and callback_helpers.h
moved into /base/functional/. Update the include paths to
directly include them in their new location.

Bug: 1364441
Change-Id: I7fbd0e591b4703f62e7f4cc98caec615a38bc1bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4144718
Auto-Submit: Avi Drissman <avi@chromium.org>
Owners-Override: Daniel Cheng <dcheng@chromium.org>
Owners-Override: Avi Drissman <avi@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1089944}

diff --git a/ash/login/login_screen_controller.cc b/ash/login/login_screen_controller.cc
index f112e9a..4204063 100644
--- a/ash/login/login_screen_controller.cc
+++ b/ash/login/login_screen_controller.cc

@@ -26,9 +26,9 @@
 #include "ash/system/status_area_widget_delegate.h"
 #include "ash/system/toast/toast_manager_impl.h"
 #include "ash/system/tray/system_tray_notifier.h"
-#include "base/bind.h"
-#include "base/callback.h"
 #include "base/debug/alias.h"
+#include "base/functional/bind.h"
+#include "base/functional/callback.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/account_id/account_id.h"