[ACR-1363] Add and Remove some playlist related APIs

[ACR-1363] Add and Remove some playlist related APIs

1. Deprecated
int mc_server_foreach_playlist(mc_server_h server, mc_playlist_cb callback, void *user_data)
int mc_client_foreach_server_playlist(mc_client_h client, const char *server_name, mc_playlist_cb callback, void *user_data)

2. Added
int mc_playlist_get_item_count(mc_playlist_h playlist, int *item_count);
int mc_playlist_get_playlist_count(const char *app_id, int *playlist_count);
int mc_playlist_foreach_playlist(const char *app_id, mc_playlist_cb callback, void *user_data);
int mc_playlist_get_playlist(const char *app_id, const char *playlist_name, mc_playlist_h *playlist);

Change-Id: I618b4f4141541bef05b452e408d90c59299b4bbf