Fix issue with local trailers, cinema mode, prerolls, & next up (#1460)

## Description
Fixes an issue where local trailers wouldn't play (or show in the queue)
if Cinema Mode is enabled and the server has a preroll/intro.

Also fix building the playback queue when "Show next up" is "Never". The
queue is shown, but not automatically played and next item dialog popup
is never shown. But to indicate playback is over, the controller show.

### Related issues
Fixes #1348
Fixes #1303

### Testing
Emulator

## Screenshots
N/A

## AI or LLM usage
None

app/src/main/java/com/github/damontecres/wholphin/services/PlaylistCreator.kt

@@ -248,6 +248,7 @@ class PlaylistCreator
                 BaseItemKind.MOVIE,
                 BaseItemKind.VIDEO,
                 BaseItemKind.MUSIC_VIDEO,
+                BaseItemKind.TRAILER,
                 -> {
                     val list =
                         buildList {