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
Signed-off-by: PipelinerArd <kristoferard@gmail.com>

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java