Roll Skia from 9c12eb0e158a to ea0c9c0935ae (4 revisions) (#44177)

https://skia.googlesource.com/skia.git/+log/9c12eb0e158a..ea0c9c0935ae

2023-07-31 brianosman@google.com Switch GCC jobs on CQ to Debian-11/GCC-10.3
2023-07-31 johnstiles@google.com Move storage of Layout to ExtendedVariable.
2023-07-31 kjlubick@google.com Make deleteBackendTexture take a const reference
2023-07-31 johnstiles@google.com Split Variable modifiers() into layout() and modifierFlags().

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,jonahwilliams@google.com,jvanverth@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

Author: skia-flutter-autoroll

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': '9c12eb0e158aa684911b05d2d65a1d4b5add1794',
+  'skia_revision': 'ea0c9c0935aecded747bb628c8e7e40bea993def',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: d146c45120a539e8829a8978954e45a8
+Signature: 8225bc6c9eb7892e1251f3210971d226
 
 ====================================================================================================
 LIBRARY: etc1