Slim Recents: Option to show topmost task [2/2]

Change-Id: I46cd6d1141ffb6893c94b10a7f0d9d9f94b92ec1
merge changes from Slim kk4.4 into local branch

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

Change-Id: Iaa14e0d4bd7ccf6413c08f3f1dcbfdf0f81d51e8