fb: volume rocker controll (wake up and volume) thanks to

CM and omni for the proxy sensor idea

Change-Id: I60f5f88e32a129afda80f5b0f4f41cb0a322b691

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
fb: fix volume rocker music track seek

based on an idea of DaneSH we use now audioservice
instead of Broadcast as well some minor
fixes in the key handling

Change-Id: If4afda046b9fbebda611615371a718122ffb57b6
Volume Rocker: Do not wake up during track seek.

* After switching to Audioservice track seek works great but it woke the device too if we select both options. Wake only if we do not skip tracks (like raising the volume).

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>