3932 Move integration test to null safety for multiple plugins (cla: yes, p: webview_flutter, p: image_picker, p: in_app_purchase, p: wifi_info_flutter, p: quick_actions, p: connectivity, p: device_info, platform-ios, platform-android, platform-macos)

3939 [image_picker] Fix camera alert localization analyzer warning (cla: yes, p: image_picker, platform-ios)

3940 [video_player] Fix pointer value to boolean conversion analyzer warnings (cla: yes, p: video_player, platform-ios)

3941 [connectivity] Ignore Reachability pointer to int cast warning (cla: yes, p: connectivity, platform-ios, platform-macos)

3947 [wifi_info_flutter] Ignore Reachability pointer to int cast warning (cla: yes, p: wifi_info_flutter, platform-ios)