Better Recents (1/2)

- Removed GoogleNow in Recents
- Show as floating window on recent apps
- 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
- Adjust size of app icon / window in recents
- Add header to recent items
- Switch app icons to the right of recent items
- Show DU background image when no recents

Credit and Thanks to Bajee11 / Jesús David

Change-Id: I6b27011d8dc1649f543b59ac0a0a5639eddfd448