OmniSwitch: let it slide

Follow android drawer style

PS6:
-adding fast hide

PS8
-fix task loading timing

PS10
-whities

Change-Id: If00599d2f0d727b089ec0a87239bdbfe5d0f0ff0
OmniSwitch: clear recent list before showing

doesnt look nice if there is a reordering during show

Change-Id: I9cff245309512eb1a5c5369a12aa63fd094e614b
Merge pull request #8 from omnirom/android-4.4

sync