[automerger] Handle bad bitrate index in mp3dec. am: 8b63812376 am: 1c388693ae am: d1cd373be8 am: b589cde346 am: c512ab83dc am: 1527d62132 am: 93783a217f

Change-Id: I2e5734274c343de5c46d01edaadae4c1a22658bd