[video_player_avplay and video_player_videohole] Add namespace to C++ code to avoid name conflicts with other plugins (#887)

Author: gin7773

packages/video_player_avplay/CHANGELOG.md

@@ -1,6 +1,7 @@
-## NEXT
+## 0.5.25
 
 * Update code format.
+* Add namespace to the C++ code to avoid name conflicts with other plugins.
 
 ## 0.5.24
 

packages/video_player_avplay/README.md

@@ -12,7 +12,7 @@ To use this package, add `video_player_avplay` as a dependency in your `pubspec.
 
 ```yaml
 dependencies:
-  video_player_avplay: ^0.5.24
+  video_player_avplay: ^0.5.25
 ```
 
 Then you can import `video_player_avplay` in your Dart code: