FW: Improve Recents (2/2)

- Moved Kill-All option to RB Settings
- Create list preference for different options
- Remove ugly Kill-All button and replace it with image
- Give the user the option to specify location of image (Bottom/Top/Left/Right)
- Add RB Icon for No recents apps
- Move recent items to the middle
- Add header to recent items
- Switch app icons to the right of recent items

Conflicts:
	core/java/android/provider/Settings.java

Change-Id: I9b8637584be6e5a54d6f6a8d973abd0497226abf
FW: Improve Recents V2.0

- Removed RB icon in "No Recents", looks weird.
- Changed Recents item header
- 2 options for colors: White/Dark (Dark RootBox)
- Moved app icon to bottom right