Restructure public side of geometry service.

mojo/services/public/interfaces/accessibility/accessibility.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module mojo;
 
-import "mojo/services/public/interfaces/geometry/geometry.mojom";
+import "mojo/services/geometry/public/interfaces/geometry.mojom";
 
 interface AxProvider {
   GetTree() => (array<AxNode> nodes);
 };
 
 struct AxNode {
   // Must be non-zero.
   uint32 id;
 
   // Can be zero if the node has no parent or next sibling.
   uint32 parent_id;
   uint32 next_sibling_id;
 
   mojo.Rect bounds;
 
   // At most one of the below will be present.
   // TODO(aa): These should become a union.
   AxLink? link;
   AxText? text;
 };
 
 struct AxLink {
   string url;
 };
 
 struct AxText {
   string content;
 };