Add metrics for search engine promo and search widget

components/search_engines/BUILD.gn

Index: components/search_engines/BUILD.gn
diff --git a/components/search_engines/BUILD.gn b/components/search_engines/BUILD.gn
index 9e4b05d3959eb1b9517006059f64ee4bcd2c56ae..fc5445c3ccdb9516c1cf2ebde8555203e57b8626 100644
--- a/components/search_engines/BUILD.gn
+++ b/components/search_engines/BUILD.gn
@@ -4,6 +4,10 @@
 
 import("//build/config/features.gni")
 import("//tools/json_to_struct/json_to_struct.gni")
+if (is_android) {
+  import("//build/config/android/config.gni")
+  import("//build/config/android/rules.gni")
+}
 
 static_library("search_engines") {
   sources = [
@@ -158,3 +162,11 @@ json_to_struct("prepopulated_engines") {
   schema_file = "prepopulated_engines_schema.json"
   namespace = "TemplateURLPrepopulateData"
 }
+
+if (is_android) {
+  java_cpp_enum("search_engine_type_java") {
+    sources = [
+      "search_engine_type.h",
+    ]
+  }
+}