[Android] Shell TitleView's child elements are cleared too early

### Description

When using `` in a .NET MAUI Android application, defining a layout with child elements (such as a Grid containing a Label and a Button) causes the child elements to be cleared immediately upon navigating back using the Shell back button.

Slowed down video:

https://github.com/user-attachments/assets/6e0066c8-b78e-461b-ac4d-3ea6717e1ac7

### Steps to Reproduce

1. Define a Shell.TitleView in XAML:
```xml






```
2. Navigate to the page where this TitleView is used.
3. Press the Shell back button to return to the previous page.
- Expected outcome: The TitleView's child elements should persist and not be cleared after navigating back.
- Actual outcome: On Android, the child elements of the TitleView are cleared immediately after navigating back.

### Link to public reproduction project repository

https://github.com/bhavanesh2001/maui-bugs/tree/shell_title_view

### Version with bug

9.0.90 SR9

### Is this a regression from previous behavior?

Not sure, did not test other versions

### 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

```shell

```