Developers will have a new option to for Android apps to track location only when in use. Android users have only been given two choices: To have apps track their location all the time, or to turn off location-tracking completely. The change brings Android in line with the options available with Apple iOS apps. Developers writing for Android Q will need to actively add the new permission information if their apps have a feature requiring all the time permission; in Android 9 or lower, the ACCESS_BACKGROUND_LOCATION permission will be automatically added.
Source: https://threatpost.com/google-location-tracking-apps/142882/