ConstrainedBox without setting AspectRatio throws exception

[h82258652]

Describe the bug

If a ConstrainedBox does not set the AspectRatio, it will throw an exception.

Regression

No response

Reproducible in sample app?

• This bug can be reproduced in the sample app.

Steps to reproduce

1. Create a `ConstrainedBox`.
2. Access its `AspectRatio` property.
3. Exception will be throw.

Expected behavior

No crash.

Screenshots

No response

Windows Build Number

• Windows 10 1809 (Build 17763)
• Windows 10 1903 (Build 18362)
• Windows 10 1909 (Build 18363)
• Windows 10 2004 (Build 19041)
• Windows 10 20H2 (Build 19042)
• Windows 10 21H1 (Build 19043)
• Windows 11 21H2 (Build 22000)
• Other (specify)

Other Windows Build number

22635

App minimum and target SDK version

• Windows 10, version 1809 (Build 17763)
• Windows 10, version 1903 (Build 18362)
• Windows 10, version 1909 (Build 18363)
• Windows 10, version 2004 (Build 19041)
• Other (specify)

Other SDK version

No response

Visual Studio Version

2022

Visual Studio Build Number

17.11.0

Device form factor

Desktop

Nuget packages

CommunityToolkit.Uwp.Controls.Primitives 8.1.240821

Additional context

No response

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