Implement GetDisplayed on android M+

chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
index 337b6f4805675d65db0dbdf06a8d639d72d75296..705d7c06db83ab7a0eb9254d91dfda185622913c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
@@ -60,6 +60,9 @@ public class StandardNotificationBuilder extends NotificationBuilderBase {
             // Notification.Builder.setPublicVersion was added in Android L.
             builder.setPublicVersion(createPublicNotification(mContext));
         }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            builder.setExtras(mExtras);
+        }
         return builder.build();
     }
 }