Roll Skia from 8c5786622b4e to 502eab4fc913 (2 revisions) (#18707)

DEPS

@@ -26,7 +26,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '8c5786622b4ecf6024356be5d5395bd1c8b1fa6f',
+  'skia_revision': '502eab4fc913e199d21c68ab45601be6f58a8b61',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

-Signature: 464d6b35254435f49dfcad5ea56935f2
+Signature: ab8f060f720a680c32227635e17b762d
 
 UNUSED LICENSES: