Audio: make safe headset volume user configurable

Conflicts:
	res/values/ras_strings.xml
move volume adjust sound preference to volume rockers layout
move volume overlay to volume rockers layout
Option to use volume keys to control media volume anytime
Lockscreen shortcuts: fix text box margin to proper gap

Fixes a long time layout glitch
Display options: allow configuration of wake on plug behavior

Bring in user interface layout
Power connect/disconnect notification