Add DartPackage annotation to all mojo_services mojoms

mojo/services/files/public/interfaces/file.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.
 
 // TODO(vtl): notes to self:
 //  - file offsets, file positions, and file sizes are int64 (though positions
 //    and sizes must always be non-negative)
 //  - buffer size parameters (for read/write) are uint32
 
+[DartPackage="mojo_services"]
 module mojo.files;
 
 import "files/public/interfaces/types.mojom";
 
 // TODO(vtl): Write comments.
 interface File {
   // Flushes/closes this file; no operations may be performed on this file after
   // this. Note that any error code is strictly informational -- the close may
   // not be retried.
   Close() => (Error err);
@@ skipping 62 matching lines @@
 
   // Special-file-specific control function, for device "files". |in| and |out|
   // are dependent on |request|.
   // TODO(vtl): Make a master list of request values somewhere.
   Ioctl(uint32 request, array<uint32>? in_values)
       => (Error error, array<uint32>? out_values);
 
   // TODO(vtl): Add a "watch"?
   // TODO(vtl): Add something analogous to fsync(2)?
 };