LayoutChildren Method does not respect the values that are given in

### Description

It's my understanding that by overriding the LayoutChildern of Contentpage let'sus to write custom code for layouting it's children, I am trying to layout the children such a way to avoid rendering over the android Navbar and the camera cutout but maui keeps placing them over the cutout/Navbar even if i give fixed values to layoutChildren method.

I am not really sure if this is how LayoutChildren is supposed to work. Please advise if I am wrong

### Steps to Reproduce

1. Create new Maui App
2. create a page that inherits from ContentPage
3. Override the LayoutChildren method and try to give your own fixed size
4. The given size is not respected, instead the whole display is used

### Version with bug

6.0 (current)

### Last version that worked well

Unknown/Other

### Affected platforms

Android

### Affected platform versions

Android 12

### Did you find any workaround?

No

### Relevant log output

_No response_

Start by reproducing the issue in a new .NET MAUI app on Android 12 with a ContentPage that overrides LayoutChildren and supplies fixed bounds. Read the LayoutChildren implementation and related layout behavior to determine whether the supplied values are expected to control the full display area. Done means the behavior is corrected or clearly documented, with regression coverage if the existing tests identify a suitable location.

Written by the indexing model from the issue text.