77755 Fix scrollbar hit testing based on pointer device kind (a: desktop, a: quality, cla: yes, f: material design, f: scrolling, framework, platform-web, waiting for tree to go green)

77756 Implement iOS app install deltas (cla: yes, platform-ios, t: xcode, tool, waiting for tree to go green)

77757 Remove mock from event_printer_test (cla: yes, tool, waiting for tree to go green)

77760 [flutter_tools] remove mocks from features test (cla: yes, tool, waiting for tree to go green)

77769 [FloatingActionButtonLocation] Avoid docked FAB to be clipped by the software keyboard (cla: yes, f: material design, framework, waiting for tree to go green)