Port forward: Volume rocker wake and Volume music controls

Policy: Volume rocker wake
--Stevespear426 based on roman's ICS code

Volume music controls
--gdanko

Fix volume track skip control with 3rd party applications
--Danesh

PS?: FIx volume wake...still want to redo this to rid of keyguard code
PS?+1: Cleanup whitespace

Change-Id: Ie4b5c77c6ef7fc062cd96345866db52d279345c9
Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>