Roll Skia from a5a6d12b3642 to 9877f459399a (2 revisions) (flutter/engine#55187)

https://skia.googlesource.com/skia.git/+log/a5a6d12b3642..9877f459399a

2024-09-13 bungeman@google.com Rename our_vulkan_headers use_skia_vulkan_headers
2024-09-13 fmalita@google.com [bazel] Initial dm support

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 aaclarke@google.com,brianosman@google.com,bwils@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

@@ -14,7 +14,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': 'a5a6d12b36427a75c04ef9863ffe219273a01466',
+  'skia_revision': '9877f459399ade54632292f7434daf5396249673',
 
   # 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/excluded_files

@@ -2641,6 +2641,7 @@
 ../../../flutter/third_party/skia/bench
 ../../../flutter/third_party/skia/codereview.settings
 ../../../flutter/third_party/skia/demos.skia.org
+../../../flutter/third_party/skia/dm/BUILD.bazel
 ../../../flutter/third_party/skia/docker/Makefile
 ../../../flutter/third_party/skia/docker/README.md
 ../../../flutter/third_party/skia/docker/binary-size/Dockerfile

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 821d84d922cdc7a041680fd49d5d408c
+Signature: 550453963016b11f46da4b96d2e2921e
 
 ====================================================================================================
 LIBRARY: etc1