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
InCallUI: fix non-intrusive for RTL

http://jira.omnirom.org/browse/OMNI-522

Change-Id: Ib712ccc2c207e329bdfa4cf64d29f2aeb130f59b
InCallUI: Disable Back button on Non-intursive InCall Card

Fix for jira issue http://jira.omnirom.org/browse/OMNI-296

PS2 to PS5: code cleanup

PS6: Remove Jira issue url from code

Change-Id: I257daccbb175265e2430f1b0b30c9175cb4b1981
[3/4] Dialer lookup

Squashed commit of the following:

commit 825ec9452df573bab23f191f4923024064b00521
Author: Xiao-Long Chen <chenxiaolong@cxl.epac.to>
Date:   Fri Feb 21 11:47:43 2014 -0500

    [WIP] Not using the PhoneNumberService API for reverse lookups anymore

    Change-Id: I75c2a4f5241a5bef5fd78610758629f7543bc4da

commit 05bc81a9c60abaaa7274f4ee7550b7d081bd3482
Author: Xiao-Long Chen <chenxiaolong@cxl.epac.to>
Date:   Fri Feb 21 11:47:08 2014 -0500

    Revert "InCallUI: Add phone number service"

    This reverts commit 88d19f23f9a311bb4880bc38535037a3541a5371.

    Change-Id: Ic43d041f50179200bfd81e803caaa71cc3395695

commit e7b109855cf80067aa63144439f6aac9feb726f9
Author: Xiao-Long Chen <chenxiaolong@cxl.epac.to>
Date:   Fri Jan 31 16:00:39 2014 -0500

    InCallUI: Add phone number service

    Change-Id: If95f5529e868110006e1196040a0595a33059ac8

Change-Id: I5f0a948d5ab14c9f2964d0eeb21f90cdb5427ffd