When the user plugs in a wired headset while listening to music through a bluetooth headset, the music audio will stop playing through the bluetooth headset. Instead, the music audio will play through the wired headset. Repro Steps: 1) Update a Flame device to BuildID: 20141017001201 2) Connect a bluetooth headset to a device. 3) Play a song and make sure the music audio is playing through the bluetooth headset. 4) Plug in a wired headset. 5) Notice the music audio stops playing through the bluetooth headset. Actual: Music audio stops playing through bluetooth headset when a wired headset is plugged in. Expected: Music audio continues to play through bluetooth headset when a wired headset is plugged in. Environmental Variables: Device: Flame 2.1 BuildID: 20141017001201 Gaia: 1ea74943cfe525c76a074ca1d7de8e51a70f6b98 Gecko: 2befa902ff5c Gonk: 05aa7b98d3f891b334031dc710d48d0d6b82ec1d Version: 34.0 (2.1) Firmware: V180 User Agent: Mozilla/5.0 (Mobile; rv:34.0) Gecko/34.0 Firefox/34.0 Repro frequency: 100% Link to failed test case: https://moztrap.mozilla.org/manage/case/14331/ See attached: logcat

This issue occurs on Flame 2.2 Master KK (319mb) (Full Flash) Music audio stops playing through bluetooth headset when a wired headset is plugged in. Flame 2.2 Device: Flame 2.2 Master KK (319mb) (Full Flash) BuildID: 20141017040208 Gaia: abef62c0623e5504a97b4fd411e879a67b285b52 Gecko: ae1dfa192faf Gonk: 52c909e821d107d414f851e267dedcd7aae2cebf Version: 36.0a1 (2.2 Master) Firmware: V180 User Agent: Mozilla/5.0 (Mobile; rv:36.0) Gecko/36.0 Firefox/36.0 This issue doesn't occur on Flame 2.0 KK (319mb) (Full Flash) Music audio continues to play through bluetooth headset when a wired headset is plugged in. Flame 2.0 Device: Flame 2.0 KK (319mb) (Full Flash) BuildID: 20141017000203 Gaia: 9c7dec14e058efef81f2267b724dad0850fc07e4 Gecko: c17df9fe087d Gonk: 05aa7b98d3f891b334031dc710d48d0d6b82ec1d Version: 32.0 (2.0) Firmware: V180 User Agent: Mozilla/5.0 (Mobile; rv:32.0) Gecko/32.0 Firefox/32.0

[Blocking Requested - why for this release]: This breaks basic functionality, and changes settings without user input. Also a regression. Nominating to block

ni? Randy for audio channel help.

Same issue as bug 1083129. Need to handle which one is the latest plug-in device.