Settings: add a way to open blacklist settings externally

Opening the activity doesn't theme the switch bar - an alias works.

Change-Id: I78efb382f4f1f4d208f122fedb0d71a86b515405
Signed-off-by: Roman Birg <roman@cyngn.com>
Merge pull request #2 from CyanogenMod/cm-12.0

Settings: add a way to open blacklist settings externally