Android CollectionView leaks if given a header or footer

[jknaudt21]

Description

This bug was discovered when modifying the tests for this PR: #16870

Turns out that when you create a CollectionView and give it a header or footer, it begins to leak.

I was expecting to see 5 logical children, but instead saw that there were 9.

Steps to Reproduce

1. Add a header and footer to the collection view on the ItemsSourceDoesNotLeak test. If Fix CollectionView not displaying header or footers #16870 has already been merged, then delete the preprocessor directives that were added

			var collectionView = new CollectionView
			{
				Header = new Label { Text = "Header" },
				Footer = new Label { Text = "Footer" },
				ItemTemplate = new DataTemplate(() => new Label())
			};

2. Run the test and observe the failure: the collection view is leaking memory and adding too many logical children

Link to public reproduction project repository

Maui main

Version with bug

8.0.0-preview.7.8842

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

No response

[rachelkang]

fyi @jonathanpeppers

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.