The ANT Radio Service and ANT+ PlugIns are similar to the system components that enable other forms of wireless connectivity on your smartphone (ie. WiFi, NFC, Bluetooth). These ANT service apps may have come pre-installed on your smartphone or were added as part of an Android update from your carrier and smartphone manufacturer.
Because these ANT services are factory pre-installed into the Android firmware as system services by the smartphone manufacturer, Android will not give users the option to uninstall them like it does with apps that you download from Google Play.
If you do not intend to use any apps that use the ANT communication, these services will never be enabled and will have no impact on your smartphone's performance.
For more information, visit https://play.google.com/store/apps/details?id=com.dsi.ant.service.socket&hl=en