Phone: Add Blacklist functionality

Forward port the Blacklist functionality from CM7.

Original code written by Cytown, modified by Cyanogen (2011-01-04),
nhnt11 (2011-05-24) and maniac103 (2012-10-02).

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
Phone: Allow voicemail notifications to be dismissed

Change-Id: I1ce0d75d8a47b580034a6804ba30cbb7647cba69