* Add covariant to `ThemeExtension.lerp`

* x

* x

* d1ac8d84e Move extension to TypefaceFontProvider instead of SkFontMgr (flutter/engine#35381)

* 55b46a70a Roll Skia from fad2781bd328 to 6cec033662c7 (3 revisions) (flutter/engine#35649)

* de4ef8c6f Roll Dart SDK from 3042d6196824 to 9be467274ae4 (1 revision) (flutter/engine#35650)

* 68beed75a Refactor - Create `Renderer` interface for CanvasKit/HTML switching (flutter/engine#35502)

* 2ecccf195 [Impeller] Enforce a minimum stroke width (flutter/engine#35576)

* 94f97c337 Roll Skia from b91dbe274717 to 94602de608e0 (4 revisions) (flutter/engine#35634)

* 6ec08c50e Roll Skia from 94602de608e0 to 8c32b0148770 (7 revisions) (flutter/engine#35636)

* 9195b7a2f Roll Dart SDK from 03506589f2d0 to c064b9bacc4d (1 revision) (flutter/engine#35637)

* f7ec70782 Roll Skia from 8c32b0148770 to a9a05d0bf0c5 (3 revisions) (flutter/engine#35639)

* 15cf53acc Image shader dispose (flutter/engine#35640)

* ee3cd0d8a Roll Skia from a9a05d0bf0c5 to 147232a3cebc (2 revisions) (flutter/engine#35641)

* 5f53ee3b2 [Impeller] Use linear sampling for reads in the texture atlas (flutter/engine#35618)

* 4ff7f7b9a Roll Fuchsia Mac SDK from JocShsJvXYeSVjgvW... to Es8SXkqDOYZ5dgYTq... (flutter/engine#35642)

* 565cc861e Roll Skia from 147232a3cebc to cc63d5dd13b6 (1 revision) (flutter/engine#35643)

* b4af69f02 Roll Dart SDK from c064b9bacc4d to 3042d6196824 (1 revision) (flutter/engine#35644)

* 8cc02dc73 Roll Skia from cc63d5dd13b6 to a4744aa054cf (2 revisions) (flutter/engine#35645)

This reverts commit 79013b2b.

This reverts commit 7e33cd5e.

Documentation for Checkbox.value previously did not cover the tristate case.