bluetooth: add setting for USB bluetooth

Change-Id: Ie94f9be42a50b8ab1eebcb2c3892cfc56ef564ca
Merge branch 'jb-mr1' of git://github.com/KFire-Android/android_device_amazon_otter-common into cm-10.1
Merge remote-tracking branch 'origin/cm-10.1' into cm-10.1