3968 [video_player] Migrate integration tests to NNBD (cla: yes, p: video_player)

3969 [flutter_plugin_android_lifecycle] Migrate integration test to NNBD (cla: yes, p: flutter_plugin_android_lifecycle)

3971 Point deprecated plugins to Plus versions (cla: yes, p: battery, p: android_alarm_manager, p: android_intent, p: share, p: package_info, p: wifi_info_flutter, p: sensors, p: connectivity, p: device_info)