Adds context menu for folders (edit/delete)

 Bug: 3214901
 Adds support for folder context menus to edit and delete folders.

Change-Id: I89cb2fa4b139ba3f59ec62b34154d5837c7f471b
diff --git a/res/menu/bookmarkscontext.xml b/res/menu/bookmarkscontext.xml
index c58d459..4d7ec7a 100644
--- a/res/menu/bookmarkscontext.xml
+++ b/res/menu/bookmarkscontext.xml
@@ -15,7 +15,8 @@
 -->
 
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
-  <group android:id="@+id/CONTEXT_MENU">
+  <group android:id="@+id/BOOKMARK_CONTEXT_MENU"
+    android:visible="false">
     <item android:id="@+id/open_context_menu_id"
       android:title="@string/open_bookmark"/>
     <item android:id="@+id/new_window_context_menu_id"
@@ -33,4 +34,11 @@
     <item android:id="@+id/homepage_context_menu_id"
       android:title="@string/set_as_homepage"/>
   </group>
+  <group android:id="@+id/FOLDER_CONTEXT_MENU"
+    android:visible="false">
+    <item android:id="@+id/edit_context_menu_id"
+      android:title="@string/edit_folder"/>
+    <item android:id="@+id/delete_context_menu_id"
+      android:title="@string/delete_folder"/>
+  </group>
 </menu>