Phone: Add Blacklist functionality

Original code written for CM7 by Cytown, Cyanogen and nhnt11.

Modified for CM10.1 by Danny Baumann and dvtonder.
Drawables by Björn Lundén

Change-Id: Ib6b8ed4b3410d8553ca061086ba7bcf3b059b1d0

Conflicts:

	res/values/strings.xml
	res/xml/call_feature_setting.xml
	src/com/android/phone/CallFeaturesSetting.java
	src/com/android/phone/PhoneUtils.java