"Bubbles are a new preview feature in Android Q, which let users easily multi-task from anywhere on their device. They are designed to be an alternative to using SYSTEM_ALERT_WINDOW and are available for developer use and experimentation in Android Q."
"The ShareSheet has changed in Android Q. The Direct Share APIs have been replaced with the new Sharing Shortcuts API. The existing Direct Share mechanism will continue to work, but have a lower priority than any apps that use the new API."
"Android Q introduces a new location permission, ACCESS_BACKGROUND_LOCATION. Unlike the existing ACCESS_FINE_LOCATION and ACCESS_COARSE_LOCATION permissions, the new permission only affects an app's access to location when it's running in the background."