Fix up hide Volume key cursor control

I'm sorry but I broke the code while review had been in progress between http://review.cyanogenmod.org/#/c/26310/
and http://review.cyanogenmod.org/#/c/32108/

Now Volume key cursor control should be hidden as intended.

Change-Id: I697984f25e6a53af4ee0c95a9951a31c5116eb91
and disable again...

Change-Id: I63dbd52b20bc971021fc5cb62538db194e3cac63
solve changes in NavRing

Change-Id: If2f5d6316878d2ae3a3707499c706c1a5280ea00
merge changes from upstream repo