Roll external/skia c7c76d81f..9d57a9fa8 (3 commits)

https://skia.googlesource.com/skia.git/+log/c7c76d81f..9d57a9fa8

Test: Presubmit checks will test this change.
Test: Ifa888cba307d8139a26abd015951603a7b3a2807
Bug: 34073812
Change-Id: Iaae461d7b5475b7da2214d6179554f5d14f05b0e