Add sound when "Phone a Friend" timer disappears

[ua2004]

During the Phone a Friend lifeline the music is played when timer is counting down. However, sometimes timer stops before the time is up and there are still several seconds left.

• If the timer stops earlier than 0 seconds then play Phone-a-Friend Stop Timer.mp3.
• If the timer stops at 0 seconds everything is OK.

[ua2004]

It's good now, but please make the background music start only after 83 - Who Wants to Be a Millionaire - Phone-a-Friend Stop Timer.mp3 has finished playing. Currently the background music starts at the same time with track 83.