75764 ScrollController.jumpTo zero should not trigger the refresh indicator (cla: yes, f: material design, f: scrolling, framework, waiting for tree to go green)

75794 Fix for #75792 - allow use of Animator<Color?> with LinearProgressIndicator (cla: yes, f: material design, framework, waiting for tree to go green)

75804 [flutter_releases] Flutter Framework 1.26.0-17.5.pre Beta Cherrypicks (cla: yes, engine, f: material design, framework, tool)

75809 Apply bottom margin to FABs that have been boosted into the Safe Area (a: fidelity, a: quality, cla: yes, f: material design, framework, waiting for tree to go green)