64380 Fix TabBar jag when user interrupts ballistic scroll (cla: yes, f: material design, framework, waiting for tree to go green)

64424 Add resampler unit test with widget (cla: yes, framework, waiting for tree to go green)

64431 Add GestureDetector.onDoubleTapDown() (cla: yes, framework)

64432 Reland “Make sure all isolates start during flutter driver tests” (a: tests, cla: yes, d: examples, framework, team, waiting for tree to go green)

64441 Fix negative usableCrossAxisExtent in release mode (cla: yes, framework, waiting for tree to go green)

64472 Update origin material button API doc with obsolete API warnings (cla: yes, f: material design, framework)