Move services/files/*.mojom -> mojo/services/files/public/interfaces/.

services/files/files.mojom

-// Copyright 2015 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.files;
-
-import "services/files/directory.mojom";
-import "services/files/types.mojom";
-
-enum FileSystem {
-  // A per-instance (i.e., one for each call to |OpenFileSystem()|) temporary
-  // file system.
-  TEMPORARY,
-
-  // A persistent, shared file system (rooted at ~/MojoDebug, which must already
-  // exist) only available in Debug builds.
-  DEBUG,
-};
-
-interface Files {
-  OpenFileSystem(FileSystem file_system, Directory& directory) => (Error error);
-};