Add screenshot tests for SingleFragmentActivity related screens

[lukstbit]

The following fragments used by SingleFragmentActivity should have screenshots tests:

• CsvImporter
• CongratsPage
• DeckOptions
• AnkiPackageImporterFragment
• ImageOcclusion
• CardInfoFragment
• Statistics

Not directly related to SingleFragmentActivity but the fragments below should also have screenshot tests:

• FilteredDeckOptionsFragment

Related issue:

• Fix edge to edge behavior for all fragments used in SingleFragmentActivity #21621