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

Change-Id: I46cd6d1141ffb6893c94b10a7f0d9d9f94b92ec1

Conflicts:
	res/values/slim_strings.xml
	src/com/android/settings/accessibility/AccessibilitySettings.java
Settings: Slimrecents background color && transparency [1/2]

Allow user to specify background color and transparency level
    for the slimrecents panel.

PS: now setting sticks through reboots and TRDS state
        changes. also, add reset to default color option.

PS: when resetting to default, use TRDS (png) resources
        instead of custom color

PS: properly set preference summary for default
        value ("TRDS default")

PS: remove LSN dependency

Change-Id: I8dd2543a3201b36f8c310de0da54f2f91ca474ef

Conflicts:
	res/values-de/slim_strings.xml
	res/values/slim_strings.xml
	src/com/android/settings/accessibility/AccessibilitySettings.java