MediaPicker CapturePhotoAsync broken on Android in nightly builds

[StefanCuypers]

Description

We switched to a nightly build to fix a problem described in #17861.
In this build however the CapturePhotoAsync call fails with a NullReferenceException.

Steps to Reproduce

1. Create new MAUI App .Net 8.0
2. Change OnCounterClicked to 'private async void ...'
3. Add line to OnCounterClicked: var photo = await MediaPicker.Default.CapturePhotoAsync();
4. Add permissions and queries required for CapturePhotoAsync on Android.
5. Run the program in an Android emulater (I'm using Pixel 5 - API 33)
6. Click on the 'Click me' button
7. Shows the camera and allows you to take a photo - no problem.
8. Edit the project file and move to the nightly build: add <MauiVersion>8.0.6-nightly.9839</MauiVersion>
9. Reload the project.
10. Run the program again.
11. Click on the 'Click me' button
12. Shows the camera and allows you to take a photo, but as soon as you confirm you get a NullReferenceException.

Link to public reproduction project repository

No response

Version with bug

Nightly / CI build (Please specify exact version)

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

8.0.5

Affected platforms

Android

Affected platform versions

Android 13.0 and 14.0

Did you find any workaround?

No response

Relevant log output

If we add a try/catch we can see the callstack:
   at Microsoft.Maui.Storage.FileSystemUtils.EnsurePhysicalPath(Uri uri, Boolean requireExtendedAccess) in D:\a\_work\1\s\src\Essentials\src\FileSystem\FileSystemUtils.android.cs:line 58
   at Microsoft.Maui.Media.MediaPickerImplementation.<>c__DisplayClass7_0.<CaptureAsync>g__OnResult|0(Intent intent) in D:\a\_work\1\s\src\Essentials\src\MediaPicker\MediaPicker.android.cs:line 96
   at Microsoft.Maui.ApplicationModel.IntermediateActivity.OnActivityResult(Int32 requestCode, Result resultCode, Intent data) in D:\a\_work\1\s\src\Essentials\src\Platform\IntermediateActivity.android.cs:line 85
--- End of stack trace from previous location ---
   at Microsoft.Maui.Media.MediaPickerImplementation.CaptureAsync(MediaPickerOptions options, Boolean photo) in D:\a\_work\1\s\src\Essentials\src\MediaPicker\MediaPicker.android.cs:line 100
   at TestCamera.MainPage.OnCounterClicked(Object sender, EventArgs e) in C:\t\TestCamera\TestCamera\MainPage.xaml.cs:line 16

[ghost]

Hi @StefanCuypers. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[Redth]

Seeing the same error here, investigating...

[Redth]

#18620 seems like the likely cause

[StefanCuypers]

Yes, I think those changes cause it. I've copied the previous version of the code directly into my project (and some code from internal functions in other objects called by it) and that code works fine. So #18620 seems to have broken the functionality.

[Redth]

#19862 was created to track some additional UI and/or Manual test coverage for these scenarios.