Settings : Launch only contacts picker for blacklist entry

Change-Id: I266d1ad7f1aab745728b33490268cb197188f2b3
BIG Halo removal and preparation to new PA's HOVER (2/2)

Change-Id: Icac68ed6c9a0b23a3e181a0bfa477ff844ff8610

Conflicts:
	res/xml/settings_headers.xml
	src/com/android/settings/pixel/Halo.java
HOVER [2/2]
Check framework commit for description. Needs our blacklist interface,
a similar implement or a removal of blacklist interface.

Change-Id: Ie02a765e696322137d8487236d415f90f7f950c8
Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>