array( "en,de,fr" => "foo.svg" ) now means the same as
array( "en" => "foo.svg", "de" => "foo.svg", "fr" => "foo.svg" ).
Bug: T76539
Change-Id: I0bf82e06be3c5f94b6ac88bbc0437b5229ceb284
Also remove some wrappers from ResourceLoaderImageModule tests that
are no longer necessary, since the files they were mocking now exist.
Bug: T86334
Change-Id: If02e58716ce8e6c8327c8939c6c6425bd48bb560