Configurable volume panel style (2/2)

    - We can set:
    1 - Single
    2 - Expandable
    3 - Expanded
    4 - None

    Part of original commit: f2eb658058a8428a76387db5891af9b652a0166d
    Thanks to @DvTonder

Change-Id: I2d5fe7e2901524ded0a28821233b3b3f3c72c1a7

Conflicts:
	res/values/cr_arrays.xml
	res/values/cr_strings.xml