Volume Rocker (squash)

- volume rocker: volume adjust sound preference
- volume rocker: allow volumes to be unlinked. make the volume overlay more functional
- volume rocker: control cursor in text field using volume keys
- volume rocker: wake. music control
- volume rocker: make safe headset volume user configurable

Conflicts:
	res/values/boost_strings.xml
Revert "Navigation bar custom height"

This reverts commit 07b9d6ffddd7b5d1d27816d069961f702620581a.

Conflicts:
	res/values/snacks_arrays.xml
	res/values/snacks_strings.xml
Navigation Height