26104 [fuchsia] rename SessionConnection to DefaultSessionConnection (cla: yes, waiting for tree to go green, platform-fuchsia)

26107 Roll Fuchsia Mac SDK from GNyjTge9c… to q1qWG9XiN… (cla: yes, waiting for tree to go green)

26108 Roll Skia from 4e9d5e2bdf04 to 84f70136abfb (4 revisions) (cla: yes, waiting for tree to go green)

26111 Roll Skia from 84f70136abfb to 66441d4ea0fa (2 revisions) (cla: yes, waiting for tree to go green)