Expose the Site Engagement Service to Java.

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 05594e9b9a012746875ef1735e5936ff5adb85da..e96679512b83deb251746e5cddb8f951cdd553e4 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -3305,6 +3305,8 @@ split_static_library("browser") {
       "dom_distiller/tab_utils_android.h",
       "download/download_request_infobar_delegate_android.cc",
       "download/download_request_infobar_delegate_android.h",
+      "engagement/site_engagement_service_android.cc",
+      "engagement/site_engagement_service_android.h",
       "geolocation/geolocation_infobar_delegate_android.cc",
       "geolocation/geolocation_infobar_delegate_android.h",
       "history/android/android_history_provider_service.cc",
@@ -3912,6 +3914,7 @@ if (android_java_ui) {
       "../android/java/src/org/chromium/chrome/browser/download/DownloadItem.java",
       "../android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java",
       "../android/java/src/org/chromium/chrome/browser/download/ui/ThumbnailProviderImpl.java",
+      "../android/java/src/org/chromium/chrome/browser/engagement/SiteEngagementService.java",
       "../android/java/src/org/chromium/chrome/browser/favicon/FaviconHelper.java",
       "../android/java/src/org/chromium/chrome/browser/favicon/LargeIconBridge.java",
       "../android/java/src/org/chromium/chrome/browser/feedback/ConnectivityChecker.java",