Revert "Effem: Add wiredheadset / loudspeaker option for output"

This reverts commit a6977aa6be5569a7c0b284285a35f4a057dbbe02.
Effem: Add wiredheadset / loudspeaker option for output

v2: remove unused stuff, add constants for output, various minor
corrections, german translation

Change-Id: Ifeed783f5c216dbfd85b3e3ab6cfcd9a99001d90
Audio focus handling

Request and handle audio focus. This is especially important to mute
audio while in a call.
Fix activity stop/start interaction in some cases
Add support for enabling Bluetooth

- FM/BT behaviour
- BT/Headset behavior

Change-Id: I965d1d47f3d911a873e7e3eaac2e2f2ccb9d381b