Revert "jf-common: fix voice headset mic"

This reverts commit a1a1197fdc8fdedc97c98efbd1a86758e4eca765.

This change has introduced a regression where, after a call using the headset mic, on subsequent calls without the headset, the device mic will not work until a reboot.

Also noticing a bug where, after listening to media using a headset (wired or BT, including in-car BT) and disconnecting, sounds stop playing via the device speaker (missed my morning wakeup alarm 2 times now).

Change-Id: I40c8f163d6cdeef681a943c3a1fff2e9f9ddfd3d