Popup with an Entry or Editor at bottom goes off screen from top when keyboard comes up

### Description

Sample:
[TestPopUpforScroll.zip](https://github.com/user-attachments/files/18585132/TestPopUpforScroll.zip)

Current Behavior:
If I place an Entry or Editor in a Popup at bottom, as soon as the soft keyboard shows up, the Popup goes off screen from top.

https://github.com/user-attachments/assets/a398db8e-0aa5-447d-9d53-f6d18dfc0a8e

Expected behavior:

### Steps to Reproduce

1. Open App

2. Click Show Popup button

3. Click inside the editor to open the keyboard

4. Whole screen is going up while Keypad is visible

5. When you close the keyboard, whole screen is visible

### Link to public reproduction project repository

https://github.com/vivekkarnekar/MAUI.git

### Version with bug

9.0.10 SR1

### Is this a regression from previous behavior?

Not sure, did not test other versions

### Last version that worked well

Unknown/Other

### Affected platforms

iOS, Android

### Affected platform versions

iOS 16-18, Android 14,15

### Did you find any workaround?

No

### Relevant log output

```shell

```

Start by running the linked MAUI reproduction project or TestPopUpforScroll.zip on iOS and Android, following the listed steps to observe the Popup when the keyboard opens. Trace the Popup and keyboard interaction from the reproduction entry point; done means an Entry or Editor in a bottom Popup remains visible and the screen does not move the Popup off the top.

Written by the indexing model from the issue text.