Move app icon related files to c/b/apps/app_service/app_icon directory.

This is pure refactor, and no function change.

BUG= 1253250

Change-Id: I878af9eb43806d54f4461bb804a6e266f90480f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3211455
Reviewed-by: Xiyuan Xia <[email protected]>
Reviewed-by: Anqing Zhao <[email protected]>
Reviewed-by: Erik Chen <[email protected]>
Reviewed-by: Dominick Ng <[email protected]>
Reviewed-by: Kyle Horimoto <[email protected]>
Commit-Queue: Nancy Wang <[email protected]>
Cr-Commit-Position: refs/heads/main@{#929551}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 1f848e0..91b58be8 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -3550,12 +3550,16 @@
       "apps/app_discovery_service/result.h",
       "apps/app_discovery_service/test_fetcher.cc",
       "apps/app_discovery_service/test_fetcher.h",
-      "apps/app_service/app_icon_factory.cc",
-      "apps/app_service/app_icon_factory.h",
-      "apps/app_service/app_icon_loader.cc",
-      "apps/app_service/app_icon_loader.h",
-      "apps/app_service/app_icon_source.cc",
-      "apps/app_service/app_icon_source.h",
+      "apps/app_service/app_icon/app_icon_factory.cc",
+      "apps/app_service/app_icon/app_icon_factory.h",
+      "apps/app_service/app_icon/app_icon_loader.cc",
+      "apps/app_service/app_icon/app_icon_loader.h",
+      "apps/app_service/app_icon/app_icon_source.cc",
+      "apps/app_service/app_icon/app_icon_source.h",
+      "apps/app_service/app_icon/dip_px_util.cc",
+      "apps/app_service/app_icon/dip_px_util.h",
+      "apps/app_service/app_icon/icon_key_util.cc",
+      "apps/app_service/app_icon/icon_key_util.h",
       "apps/app_service/app_launch_params.cc",
       "apps/app_service/app_launch_params.h",
       "apps/app_service/app_service_metrics.cc",
@@ -3567,12 +3571,8 @@
       "apps/app_service/app_service_proxy_factory.h",
       "apps/app_service/browser_app_launcher.cc",
       "apps/app_service/browser_app_launcher.h",
-      "apps/app_service/dip_px_util.cc",
-      "apps/app_service/dip_px_util.h",
       "apps/app_service/extension_uninstaller.cc",
       "apps/app_service/extension_uninstaller.h",
-      "apps/app_service/icon_key_util.cc",
-      "apps/app_service/icon_key_util.h",
       "apps/app_service/intent_util.cc",
       "apps/app_service/intent_util.h",
       "apps/app_service/launch_utils.cc",
@@ -4496,6 +4496,10 @@
   if (is_chromeos_ash) {
     assert(enable_system_notifications)
     sources += [
+      "apps/app_service/app_icon/arc_activity_adaptive_icon_impl.cc",
+      "apps/app_service/app_icon/arc_activity_adaptive_icon_impl.h",
+      "apps/app_service/app_icon/arc_icon_once_loader.cc",
+      "apps/app_service/app_icon/arc_icon_once_loader.h",
       "apps/app_service/app_platform_metrics.cc",
       "apps/app_service/app_platform_metrics.h",
       "apps/app_service/app_platform_metrics_service.cc",
@@ -4504,10 +4508,6 @@
       "apps/app_service/app_service_proxy_chromeos.h",
       "apps/app_service/app_shortcut_item.cc",
       "apps/app_service/app_shortcut_item.h",
-      "apps/app_service/arc_activity_adaptive_icon_impl.cc",
-      "apps/app_service/arc_activity_adaptive_icon_impl.h",
-      "apps/app_service/arc_icon_once_loader.cc",
-      "apps/app_service/arc_icon_once_loader.h",
       "apps/app_service/file_utils.cc",
       "apps/app_service/file_utils.h",
       "apps/app_service/menu_util.cc",