CFibers: Heads up meets SlimKat....SlimKat meets Google IO [4/5]

For detailed explanation see here: https://gerrit.slimroms.net/#/c/9937/

This patch adds the 4 possible user configurable settings.

1. Enable always expanded heads up notifications.
2. Set heads up snooze time
3. Set timout timer
4. Show updates of pending notifications

Change-Id: I098f2454a241a2f2179404064694533a7678ad7f
Signed-off-by: Stefano Mura [STELIX PippoX3] <ssspinni@gmail.com>
Heads up meets SlimKat....SlimKat meets Google IO meets Validus[4/5]