This includes the scrolling ad banner (https://github.com/flutter/flutter/issues/143257) and the bottom anchored banner (https://github.com/flutter/flutter/issues/150230). These are the most common use case for ad banners. It will be helpful for us to measure the improvements and catch potential regressions. CC @jonahwilliams
