Settings: Allow disabling adjusting volume sounds [2/2]

* Option stored in Settings->Sounds & notification->Other settings.

Signed-off-by: BigBrother1984 <carlosavignano@aospa.co>
Change-Id: I9bb604179bece5298f1a94b6d2c1680a71e1c2a4
Merge pull request #38 from AOSPA-legacy/lollipop

Settings: Allow disabling adjusting volume sounds [2/2]