Roll Skia from e073a4fad57a to b6fa819eb54c (1 revision) (flutter/engine#49886)

https://skia.googlesource.com/skia.git/+log/e073a4fad57a..b6fa819eb54c

2024-01-19 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE from d093c3d3c22c to 0da652252424 (8 revisions)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC brianosman@google.com,jlavrova@google.com,jonahwilliams@google.com,rmistry@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

DEPS

@@ -17,7 +17,7 @@ vars = {
   'llvm_git': 'https://llvm.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': 'e073a4fad57afaf560a45e541e8f59489a1cc77e',
+  'skia_revision': 'b6fa819eb54ca86d160edce6a143a57aa9a9b6e4',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.