fix issue 9255 (Wrong Date format DatePicker Windows)

[Miro382]

Description of Change

Fix bad date format for Windows platform.
Bug description:
If the date format is set to yyyy-MM-dd.
In Android the date shows as 2022-08-09.
In Windows the date shows as 2022-8-9.

Issues Fixed

Fixes 9255

[ghost]

Hey there @Miro382! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[rmarinho]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).

[jfversluis]

Hey @Miro382! Thank you so much for your contribution here! While looking into this one, I found that there was already #9924.

Now which one was I going to pick?! 🤷‍♂️

First, the other PR was earlier, so that was one. Then second, what their PR has over this one is that it's a bit more flexible, but I guess what really pushed me over the line was that it also added tests.

Don't get me wrong, I very much appreciate the time and effort you put into this and I really wish I could take in both your PRs and make you .NET MAUI contributors, but in this case I'm going to go with the other PR.

Just wanted to give you my thoughts here, maybe it can be helpful in hopefully future contributions that we will see from you. I promise that we will look at them faster from here on out 😬

Thank you again!