7687 Lower the threshold to raster cache pictures (cla: yes)

7689 Revert “Disable the persistent cache (#6835)” (cla: yes)

7691 Don’t warn for Async texture uploads on Fuchsia (cla: yes)

7692 Ensure dart2js and kernel worker snapshots are copied out of gen dir (cla: yes)

7694 Create stubbed dart:ui implementation, dart2js libraries file, copy rule (cla: yes)

7701 Revert “Lower the threshold to raster cache pictures” (cla: yes)

7702 Update snapshot build rules to generate .o files instead of .S files on Windows (Windows, cla: yes)

7708 [fuchsia] Update scenic include (cla: yes)

7713 Disable wuff on Windows (cla: yes)