Don't display Custom for PHONE_TYPE=CUSTOM part 1.
Don't display Custom for PHONE_TYPE=CUSTOM part 1.

Dialer sometimes creates custom PHONE_TYPE values without
specifying the custom string. In this case, we shouldn't
display "Custom". We should display nothing.

BUG 21900262

Change-Id: I11aff369c76126a3f60f95aa589ae2a8a3e98bb1

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base