Accept any kind of A2DP device for using the BT preferences, not only
headsets.

Change-Id: I30c7ae24943f57e0dc6691ffc0652eeb2f11a83e
Listen to A2DP profile connection instead of device connection.

Change-Id: I583de3b615c2b6d3b9cc72fbbec52ceead1e07bf
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_packages_apps_DSPManager into cm-10.1