Fix transform desync

[Gillibald]

What does the pull request do?

This PR makes sure the platform drawing context always has the same total matrix as the drawing context wrapper. Otherwise, some drawing operations might see the wrong total matrix.

It is unknown why this happens

What is the current behavior?

What is the updated/expected behavior with this PR?

How was the solution implemented (if it's not obvious)?

Checklist

• Added unit tests (if possible)?
• Added XML documentation to any related classes?
• Consider submitting a PR to https://github.com/AvaloniaUI/avalonia-docs with user documentation

Breaking changes

Obsoletions / Deprecations

Fixed issues

Fixes: #16337
Fixes: #16610

[kekekeks]

Could you add a render test?

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0050262-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[Gillibald]

@kekekeks I added some tests. At first, I tried to add some cross-tests but couldn't reproduce the issue. Then I added the original sample as a render test and the issue showed up.

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0050596-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0050955-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0051785-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]