Fix potential NPE

Change-Id: Ic2c7243601b0830e0532818b2f4007d9c10e0de8
[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
Merge "Fix potential NPE" into cm-11.0
Merge pull request #1 from CyanogenMod/cm-11.0

Merge