Google has announced Trusted Web Activity, a new technology for integrating PWAs and other web-app content with an Android app. The company also announced User Experience Report, a public dataset of key user experience metrics. The dataset will initially focus on loading metrics.
When Google released the Android 10 beta earlier this year, it introduced the bubbles notification feature. Bubbles are built into the notification system and are used as an alternative to using the SYSTEM_ALERT_WINDOW to present messages on top of the app currently in use.