Rename mojo_application GN templates to service*

ash/sysui/BUILD.gn

Index: ash/sysui/BUILD.gn
diff --git a/ash/sysui/BUILD.gn b/ash/sysui/BUILD.gn
index 3b4ca6dcdb3d063c0572e41af4bd6d538bb24c49..436f31419d190a5ac08d8e83e20c94f607221f1e 100644
--- a/ash/sysui/BUILD.gn
+++ b/ash/sysui/BUILD.gn
@@ -3,9 +3,9 @@
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
-import("//mojo/public/mojo_application.gni")
-import("//mojo/public/mojo_application_manifest.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
+import("//services/shell/public/cpp/service.gni")
+import("//services/shell/public/service_manifest.gni")
 
 source_set("lib") {
   sources = [
@@ -73,12 +73,12 @@ source_set("lib") {
   }
 }
 
-mojo_application_manifest("manifest") {
-  application_name = "ash_sysui"
+service_manifest("manifest") {
+  name = "ash_sysui"
   source = "manifest.json"
 }
 
-mojo_native_application("sysui") {
+service("sysui") {
   output_name = "ash_sysui"
   sources = [
     "main.cc",