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

NOT USED FOR Liquid -> PS: properly set preference summary for default
        value ("TRDS default")

PS: remove LSN dependency

Conflicts:
	res/xml/recent_panel_settings.xml
	src/com/android/settings/liquid/RecentPanelSettings.java

Change-Id: I5c9fe11553bfce184e66b24ac76360e048bc7f0f

Conflicts:
	res/values/ldroid_strings.xml
	res/xml/recent_panel_settings.xml
	src/com/android/settings/ldroid/RecentPanelSettings.java
Fix missing backgroud color declaration

Change-Id: If6d22941af8f870e6f6242a458381cea85623a12

Conflicts:
	src/com/android/settings/ldroid/RecentPanelSettings.java
Fix status bar network traffic default color

Change-Id: I60d2364a4e4603e95dd6b9a2e4db296809e74fef

Conflicts:
	src/com/android/settings/liquid/NetworkTraffic.java