fix: Ensure ListTile's material parent has a transparent color for proper tile bgcolor visibility

[ndonkoHenri]

Resolves #4855

Test Code

import flet as ft


def main(page: ft.Page):
    page.theme_mode = ft.ThemeMode.LIGHT
    page.add(
        ft.Card(
            color=ft.Colors.RED,
            content=ft.Column(
                controls=[
                    ft.ListTile(
                        title=ft.Text("Hello"),
                    ),
                ],
            ),
        )
    )


ft.app(main)

Summary by Sourcery

Bug Fixes:

• Fix the visibility of ListTile's bgcolor when the parent has a color.