Ability to hide Volume State toggles in Power Menu (RC Part)

With the numerous ways you can change Volume States 
(tiles, toggles, NavBar, NavRing, lockscreen), some 
may want to be able to hide the toggles that are in 
the Power Menu if they aren't using them.

This also contains the string edits I've made in my other 
commit.

Patch Set 2: White Space and Formatting Fixes

Patch Set 3: Hopefully I got the formatting down this time...

Patch Set 4: Formatting
Change-Id: Ie7af1545435ff601d7f6acd022c2266365a54eea
Merge "Ability to hide Volume State toggles in Power Menu (RC Part)" into jb-mr1