Settings: Move home answer & power end call options

Move 'Home answers call' & 'Power ends call' options to button settings

Change-Id: I2f365a3d278b0845b7c5ffcfe70c54160a00c24e

Conflicts:
	res/values/cm_strings.xml
	res/xml/accessibility_settings.xml
	res/xml/button_settings.xml
	src/com/android/settings/accessibility/AccessibilitySettings.java
	src/com/android/settings/cyanogenmod/ButtonSettings.java