added volume adjustment also for BT voice audio

Change-Id: I71f4fd2e64d192d92b89a77d9517060a891e0002
FW: Option to hide Camera widget from lockscreen (1/2) - cleanup

Change-Id: Ic43f223a895b094e4ce8a248269a337376c8d8a4
Fix crash on KeyguardViewManager when lockscreen hasn't been shown

If lockscreen has never appeared (first rom boot), and you enable see
through, you will end up crashing system_server. This fixes it

Patchset 2: fix comment typo