[fuchsia] Roll F26 (#165697)

Includes a change to:

- Remove LogSink.Connect and handle unknown interactions in mock.
  This method is gone in F26.

Bug: https://fxbug.dev/405407295

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we expect every widget to implement].
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above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
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Fixes] where supported.
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DEPS

@@ -215,7 +215,7 @@ vars = {
 
   # The version / instance id of the cipd:chromium/fuchsia/gn-sdk which will be
   # used altogether with fuchsia-sdk to generate gn based build rules.
-  'fuchsia_gn_sdk_version': 'T6ahk2PZvX-n2RabPqFNTu_AL3tTBGgQMnfAOavwCtsC',
+  'fuchsia_gn_sdk_version': 'K_1kHDN1WfObPYHyad1M8zegaI4awe8GiPhafqb99Y0C',
 }
 
 gclient_gn_args_file = 'engine/src/flutter/third_party/dart/build/config/gclient_args.gni'

engine/src/flutter/fml/platform/fuchsia/log_interest_listener_unittests.cc

@@ -74,9 +74,6 @@ class MockLogSink : public component_testing::LocalComponentImpl,
     }
   }
 
-  void Connect(fuchsia_logger::LogSinkConnectRequest& request,
-               ConnectCompleter::Sync& completer) override {}
-
   void ConnectStructured(
       fuchsia_logger::LogSinkConnectStructuredRequest& request,
       ConnectStructuredCompleter::Sync& completer) override {}
@@ -88,6 +85,10 @@ class MockLogSink : public component_testing::LocalComponentImpl,
               ZX_OK);
   }
 
+  void handle_unknown_method(
+      fidl::UnknownMethodMetadata<fuchsia_logger::LogSink> metadata,
+      fidl::UnknownMethodCompleter::Sync& completer) override {}
+
  private:
   bool first_call_ = true;
   fit::closure quit_loop_;