[flutter_tools] add vm service method to pull SkSL (#57813)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/600338286f124a1b29fab83f7fd0e7141d2bde80
1 file changed
tree: f18d2b85eb8e48d0cf79eaf8a7d2172991287141
  1. commits.json