Temporarily add empty header files to video_player_avfoundation so include directory is downloaded (#6694)

Fixes flutter/flutter#148003.

Temporary solution to make tree green.

Author: vashworth

packages/video_player/video_player_avfoundation/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.6.1
+
+* Adds files to make include directory permanent.
+
 ## 2.6.0
 
 * Adds Swift Package Manager compatibility.

packages/video_player/video_player_avfoundation/darwin/video_player_avfoundation/Sources/video_player_avfoundation_ios/include/FVPEmpty.h

@@ -0,0 +1,6 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Empty file to perserve include directory in pub-cache. See
+// https://github.com/flutter/flutter/issues/148002 for more information.

packages/video_player/video_player_avfoundation/darwin/video_player_avfoundation/Sources/video_player_avfoundation_macos/include/FVPEmpty.h

@@ -0,0 +1,6 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Empty file to perserve include directory in pub-cache. See
+// https://github.com/flutter/flutter/issues/148002 for more information.

packages/video_player/video_player_avfoundation/pubspec.yaml

@@ -2,7 +2,7 @@ name: video_player_avfoundation
 description: iOS and macOS implementation of the video_player plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/video_player/video_player_avfoundation
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+video_player%22
-version: 2.6.0
+version: 2.6.1
 
 environment:
   sdk: ^3.2.3