FlexLayout AlignContent doesn't work

### Description


https://docs.microsoft.com/en-us/dotnet/maui/user-interface/layouts/flexlayout#aligncontent

~"SpaceAroun" should be "SpaceAround"~

~"SpaceAround" squiggles as an invalid value.~ (this is fixed already)

Also doesn't work.

### Steps to Reproduce

```

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### Version with bug

6.0.408 (current)

### Last version that worked well

Unknown/Other

### Affected platforms

Android

### Affected platform versions

31

### Did you find any workaround?

_No response_

### Relevant log output

_No response_

Start by running the reported FlexLayout sample on Android platform version 31 and compare AlignContent="SpaceAround" with the linked documentation. Trace the FlexLayout AlignContent entry point to determine why the layout does not distribute the two buttons as documented; done means the sample produces the expected SpaceAround arrangement.

Written by the indexing model from the issue text.