qs: sync volume tile icon

Display the current volume level in the volume qs tile

Patchset 2: Remove trailing whitespaces

Change-Id: I2dcf31ab2476883770a01ca1b015e3973417e855
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge "qs: sync volume tile icon" into cm-11.0