NavigationBar: Custom height (2/2)

Patchset 3 : Clean up array values
Patchset 4 : Add missing translatable="false"

Change-Id: I751ae54de1adf96367948735558363ce0dbb9f89

Conflicts:
	res/values/arrays.xml
	res/values/strings.xml
	res/xml/system_settings.xml
	src/com/android/settings/cyanogenmod/SystemSettings.java