Blacklist: Avoid crash when dialog dismissed via back button.

A user usually presses the back button only
when he/she does not want the changes to be saved.
Hence we need to revert the changes that took place
when the dialog is dismissed with back button.

Change-Id: Ifa3ef41f02f11d1e1627071532d8f915e3b445b6
Slim Recents: Option to show topmost task [2/2]

Change-Id: I46cd6d1141ffb6893c94b10a7f0d9d9f94b92ec1

Conflicts:
	res/values/cr_strings.xml
	res/xml/recents_panel_settings.xml
	src/com/android/settings/accessibility/AccessibilitySettings.java
	src/com/android/settings/ldroid/RecentPanelSettings.java