Add announcement handles for block-in/out/ncos.

db_scripts/diff/9159.down

@@ -0,0 +1,3 @@
+USE provisioning;
+DELETE FROM voip_sound_handles WHERE name IN
+	('block_in', 'block_out', 'block_ncos');

db_scripts/diff/9159.up

@@ -0,0 +1,5 @@
+USE provisioning;
+INSERT INTO voip_sound_handles (name) VALUES
+	('block_in'),
+	('block_out'),
+	('block_ncos');