rl-api: expose currently playing music/jingle

runelite-api/src/main/java/net/runelite/api/Client.java

@@ -1167,6 +1167,17 @@ public interface Client extends OAuthApi, GameEngine
 	 */
 	void setMusicVolume(int volume);
 
+	/**
+	 * @return true if the current {@link #getMusicCurrentTrackId()} is a Jingle, otherwise its a Track
+	 */
+	boolean isPlayingJingle();
+
+	/**
+	 * @return Currently playing music/jingle id, or -1 if not playing
+	 * @see #isPlayingJingle()
+	 */
+	int getMusicCurrentTrackId();
+
 	/**
 	 * Play a sound effect at the player's current location. This is how UI,
 	 * and player-generated (e.g. mining, woodcutting) sound effects are