fix(wpf): Fix IsLeftButtonPressed status on WPF platform

[lindexi]

GitHub Issue (If applicable): #14393

PR Type

What kind of change does this PR introduce?

• Bugfix

What is the current behavior?

We can receive the pointer event with IsLeftButtonPressed is true when touch release.

What is the new behavior?

We can receive the pointer event with IsLeftButtonPressed is false when touch release.

See https://github.com/unoplatform/uno/pull/16378/files#r1575262313

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] Docs have been added/updated which fit documentation template (for bug fixes / features) Not need.
• [ ] Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• [ ] Validated PR Screenshots Compare Test Run results.
• [x] Contains NO breaking changes
• [x] Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• [x] Commits must be following the Conventional Commits specification.

Other information

Cc @dr1rrb , and I will add more information about the barel button and the eraser status later.

Internal Issue (If applicable):

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