[Android] Fix issue using RefreshView with CollectionView and empty GroupHeader

[jsuarezruiz]

Description of Change

Fix RefreshView issue with CollectionView using a single "zero height" element in GroupHeader.

Issues Resolved

• fixes #12056

API Changes

None

Platforms Affected

• Android

Behavioral/Visual Changes

None

Before/After Screenshots

Testing Procedure

Launch Core Gallery and navigate to the issue 12056. If can do Pull to Refresh, the test has passed.

PR Checklist

• [ ] Targets the correct branch
• [ ] Tests are passing (or failures are unrelated)

[bondarenkod]

Excellent job @jsuarezruiz, I've been using this fix in my 'XF issues patched edition' since you published it.

It would be great to have this merged into 5*! Up!

[Stef-Halmans]

Can this fix be merged? I really need this bug fixed without having to add an item with some height to the header.