Roll Skia from d0918de21c1a to aa208c8a2d60 (2 revisions) (flutter/engine#44981)

https://skia.googlesource.com/skia.git/+log/d0918de21c1a..aa208c8a2d60

2023-08-22 fmalita@chromium.org [skottie] Fix GaussianBlur repeat edge pixels
2023-08-22 brianosman@google.com Stop running two different scales on perf bots

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,jimgraham@google.com,lovisolo@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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

DEPS

@@ -18,7 +18,7 @@ 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': 'd0918de21c1a15edd4daccba4c183d8bb0139cf4',
+  'skia_revision': 'aa208c8a2d60b087ef74d35737b037cfe85a4fc4',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 0bce4386ca982cc6b802210b678e66b5
+Signature: 945ce2c9dd6939862f98780a7be5ac59
 
 ====================================================================================================
 LIBRARY: etc1