[automerger] Handle bad bitrate index in mp3dec. am: 8b63812376 am: 1c388693ae am: d1cd373be8 am: b589cde346 am: c512ab83dc am: 1527d62132 am: 93783a217f am: 04ba4099f3 am: c8d96838ba am: 2bd167ec3c
am: 3f60a22fd8

Change-Id: Ia614999bf0716fad5e9ebfddeaaffecc655edf79