[[2/2]port in hardware key settings and button backlight controls

Change-Id: I925fd9d9c02b86d8e93c8b9e25870433f7c20bde

Conflicts:
	proguard.flags
	res/values/cm_arrays.xml
	res/values/cm_strings.xml
	res/values/config.xml
	res/xml/power_menu_settings.xml
	src/com/android/settings/cyanogenmod/ButtonSettings.java
	src/com/android/settings/cyanogenmod/PowerMenu.java
settings: port volume key cursor control & reorientation

Framework part seems to have survived the merge.

Move volume key cursor control from language & input
to button settings.

Change-Id: Ice2b266e8fdbcdf805d36d8f2e335b569e57be65

Conflicts:
	res/xml/button_settings.xml
	src/com/android/settings/cyanogenmod/ButtonSettings.java