InCallUI: Heads up meets SlimKat....SlimKat meets Google IO [2/4]

Add native heads up support on dialer.

We only have show call in background feature. We combine it now with heads up.
So it is doing exactly same like on Google IO was shown.

Enabled by default.

- Notification is expanded by default
- Send as requested to force show the heads up no matter what.

Change-Id: I819316226f990058e6da6c289b8424d80ac1456e
InCallUI: translation - RU

Fixing error with answer headsup
Thanks @Kondra007

Change-Id: Id5d30df4cada0a569859f31a727425cb360d2278
InCallUI: fix blue call button background on some devices

Fixes reports of this: http://goo.gl/zTgVGQ

PS2: A little bit darker.
Change-Id: I2097018811aa7852604e987b9142a4c3d4aa4a30
Merge remote-tracking branch 'slim/kk4.4' into kk4.4