util: Add BlacklistUtils

Change-Id: Id29990bd95f20f7a3b4eae4e0419f1569d3614c1
[2/7] telephony: Blacklist Support

Base: https://gerrit.omnirom.org/#/c/5668/
InCallUI: https://gerrit.omnirom.org/#/c/5669/
Mms: https://gerrit.omnirom.org/#/c/5671/
Settings: https://gerrit.omnirom.org/#/c/5011/
TelephonyProvider: https://gerrit.omnirom.org/#/c/5012/
Telephony: https://gerrit.omnirom.org/#/c/5010/

Change-Id: I4c46c8b5f2bca986e75b97aa522edef3c767778a
util: Add BlacklistUtils

Change-Id: Id29990bd95f20f7a3b4eae4e0419f1569d3614c1

Conflicts:
	src/java/com/android/internal/telephony/util/BlacklistUtils.java
Telephony: Add blacklist elements

Change-Id: Icc42a16e13a52c207d2684326adbfaceb639b521