[sksg] Fix group hit-testing order

Change-Id: Idc25109a598caabf01e3ab61dc97f984ff453d40
Reviewed-on: https://skia-review.googlesource.com/c/191664
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
2 files changed