In `PlayerWrapper.getCurrentTimelineWithCommandCheck()` we
always return `new CurrentMediaItemOnlyTimeline(this)` in
case the wrapped player doesn't have `COMMAND_GET_TIMELINE`
available but has `COMMAND_GET_CURRENT_MEDIA_ITEM`. This is
emulating a single item timeline with a static window count
of 1 which isn't correct when the wrapped player is empty.
Instead, when the wrapped player is empty we need to return
an empty timeline to match the wrapped player.
Issue: androidx/media#2320
PiperOrigin-RevId: 746071237
(cherry picked from commit 5f940af3df5e644b33d45c78cd5103f78566efd0)
75e2522862