Move metrics related files to c/b/apps/app_service/metrics directory.

This is pure refactor, and no function change.

BUG= 1253250

Change-Id: I2ed5ea490b2ec12292bf368dc4d3ada64daaaf98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3212271
Reviewed-by: Dominic Battré <[email protected]>
Reviewed-by: Xiyuan Xia <[email protected]>
Reviewed-by: Dominick Ng <[email protected]>
Commit-Queue: Nancy Wang <[email protected]>
Cr-Commit-Position: refs/heads/main@{#929671}
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index d5ed8fa..9546c42 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -273,7 +273,7 @@
 #include "ash/components/quick_answers/public/cpp/quick_answers_prefs.h"
 #include "ash/constants/ash_pref_names.h"
 #include "ash/public/cpp/ash_prefs.h"
-#include "chrome/browser/apps/app_service/app_platform_metrics_service.h"
+#include "chrome/browser/apps/app_service/metrics/app_platform_metrics_service.h"
 #include "chrome/browser/apps/app_service/webapk/webapk_prefs.h"
 #include "chrome/browser/ash/account_manager/account_manager_edu_coexistence_controller.h"
 #include "chrome/browser/ash/app_mode/arc/arc_kiosk_app_manager.h"