35573 update packages (cla: yes, team)

35574 Fix semantics for floating pinned sliver app bar (a: accessibility, cla: yes, f: scrolling, framework, waiting for tree to go green)

35646 Prepare for Socket implements Stream (cla: yes)

35657 Remove paused check for tooling tests (cla: yes, tool)

35681 Disable incremental compiler in dartdevc (cla: yes, tool)

35684 Fix typo in main.dart templates (cla: yes, d: api docs, framework)

35708 disable a test case in xcode_backend.sh (cla: yes, tool)

35709 Remove web, fuchsia, and unsupported devices from all (cla: yes, tool)