Persistent BottomSheet are not dismissible via a11y by @goderbauer in https://github.com/flutter/flutter/pull/107435

[framework] SliverDecoration by @jonahwilliams in https://github.com/flutter/flutter/pull/107269

Update PopupRoute docs and add an example by @TahaTesser in https://github.com/flutter/flutter/pull/106948

Add a snapAnimationDuration param in DraggableScrollableSheet by @hangyujin in https://github.com/flutter/flutter/pull/107396

Remerge “Fixed AnimatedSwitcher chain produced duplicates” after fixing issues with g3 by @youssef-attia in https://github.com/flutter/flutter/pull/107476