* Fixes #1262 - Compute correct sizes for portrait videos * Add unit test * Tweaks following code review
* Add sample files to use in the MediaUploadingPreprocessor unit tests * Add MediaUploadingPreprocessor unit tests
* Media provider tests * Moved classes to separate files * Moved image file * Removed unused image file * Rebase and refactor. Replace removed error type. Refactor XYZMock to MockXYZ. Co-authored-by: Doug <douglase@element.io>