Settings: Adds ability to answer call with hardware HOME button (2/2)

Port of CM commit: f8c9fbcb214f6881ddb6ac02fa5ae45518828be7
Full Credit to CM team

Patchset 2: correcting comment in strings.xml
Patchset 3: fixing total derp of strings.xml

fusionjack: Forward port from SlimBean commit a2933f3bae8193f797d64109d6c3d5c4dec90dec

Conflicts:
	src/com/android/settings/AccessibilitySettings.java

Change-Id: I4fd609a52b4c176d324cf613bf069403ebe8bedc

Conflicts:
	res/xml/accessibility_settings.xml
	src/com/android/settings/accessibility/AccessibilitySettings.java