* Wire up paragraph font weight and font style in canvas golden test

* Update TODOs in test

* Update goldens lock

* Include paragraph height in the top-level text style.

* Update test comment

* Update goldens lock

Add a blendMode to BackdropFilter layers to enable developers to control blending on save layers (#19631)

* Roll CanvasKit to 0.25.1

* Update SkParagraph tests

Previously messages logged from Dart code (e.g. via the print function)
were handled directly in the engine by platform-specific code. This
factors out a LogMessage(tag, message) callback that embedders can
implement with platform-specific code.

This also eliminates a dependency on platform-specific code in the core,
and provides more flexibility to embedders than the current fallback to
stdout, which can be a problem on platforms without a traditional stdout
or with restrictions on stdout.

Fixes https://github.com/flutter/flutter/issues/79685

Used the the `misspell` tool available at
https://github.com/client9/misspell, then applied hand-corrections. It's
possible we could adopt this as a presubmit, but there are still enough
false positives that it may not be worth the effort.

Send a null response to signal that a message is not implemented on the web text input channel (#25314)

This change introduces a semantics flag to indicate whether a node
represents a virtual keyboard key.