Move //mojo/services/X/public/... to //mojo/services/X/... (part 3).

mojo/services/prediction/public/interfaces/prediction.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.
-
-[DartPackage="mojo_services"]
-module prediction;
-
-struct PrevWordInfo {
-        string word;
-        bool is_beginning_of_sentence;
-};
-
-struct PredictionInfo {
-        array<PrevWordInfo> previous_words;
-        string current_word;
-};
-
-interface PredictionService {
-  GetPredictionList(PredictionInfo prediction_info) => (array<string>? prediction_list);
-};