[3/3] Flip to Mute/Reject Call

Ported over from 4.2 implementation (thanks sasikumardr for that)

Original author of this patch was bugadani

We did just a cleanup

Provide easy mute and dismiss functionality for the phone application.

Available actions:

0: mute ringer
1: dismiss call
2: no action (default)

PS:
- fix NPE

Change-Id: Ia10df0045e9919c6b7efc97857abaeba246c365d
In-Call UI from blue to white

we changed the default dialpad from blue to white
but forgot this in call dialpad,
make it white ui to be consistent

Change-Id: Ie715340d69adb1514e5f1d5bb159b8c42494015a
trds: cleanup!

drawables not needed anymore after this
https://gerrit.slimroms.net/#/c/1675/

Change-Id: Ic237384fe60f23dd2b953da5d7be36c9a4c1191d
InCallUI: fix non intrusive incallui layout

- makes the decline/answer buttons evenly sized
- decrease font size of buttons to 13sp so the non-english button labels fit better

before: https://www.dropbox.com/s/g9mn72qhzq6wlbt/2014-01-01%2006.00.31.png
after:  https://www.dropbox.com/s/dfhmaliz6a21lk5/2014-01-01%2010.30.42.png

Change-Id: I88e0f0a1358595f2ce86dddcae2ab4d4e788fc1a