Roll Skia from 7d9d5ac84d8f to d7f2d1083979 (1 revision) (flutter/engine#46091)

https://skia.googlesource.com/skia.git/+log/7d9d5ac84d8f..d7f2d1083979

2023-09-20 maryla@google.com Fix default values for gain map metadata.

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,rmistry@google.com,tdenniston@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': '7d9d5ac84d8f6664bbcaaacfa04243ed4eccd614',
+  'skia_revision': 'd7f2d108397955f83c75bed968068e7dfa255970',
 
   # 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: 1a0051b23611265eaab51ccc042ffd3f
+Signature: 2d4b182938835878194a7840556a574a
 
 ====================================================================================================
 LIBRARY: etc1