Fix possible NPE in DialerDatabaseHelper

In certain cases (third party contact backup solutions?) it is possible
for raw contacts to end up with null display names, which the Dialer
was crashing on. This fix performs a null check and inserts the default
(No name) contact name if we find that the display name is null.

Bug: 11750613
Change-Id: Ifbaf2861534e6eaf8a86d50d584d11a9fa38b65f
[2/2] Dialer: Add a non-intrusive dialoger for incoming calls

Change-Id: Ibbb9653b4a1da12fe3a7ad8f98ecbb8bffb13311
Dialer: Update Icons to KitKat

* Icons were Jellybean still. This is KitKat!!!

Change-Id: Ib6527d2d77f10ccec12694a45bc4e1cabb88742b