[Audio] Show correct time remaining for bumped tracks (#3375)

* Fixes Bump play

* *sigh*

redbot/cogs/audio/utils.py

@@ -43,6 +43,7 @@ __all__ = [
     "CacheLevel",
     "format_playlist_picker_data",
     "get_track_description_unformatted",
+    "track_remaining_duration",
     "Notifier",
     "PlaylistScope",
 ]
@@ -126,6 +127,20 @@ async def queue_duration(ctx) -> int:
     return queue_total_duration
 
 
+async def track_remaining_duration(ctx) -> int:
+    player = lavalink.get_player(ctx.guild.id)
+    if not player.current:
+        return 0
+    try:
+        if not player.current.is_stream:
+            remain = player.current.length - player.position
+        else:
+            remain = 0
+    except AttributeError:
+        remain = 0
+    return remain
+
+
 async def draw_time(ctx) -> str:
     player = lavalink.get_player(ctx.guild.id)
     paused = player.paused