Revert "phone: Enable the blacklist by default"

This reverts commit 6558d130b0765b60b4b5bfe277cca26bca7801a6.
Make contacts app aware of blacklist setting (2/3)

Also fix up notify option key while we're at changing the user's
settings ;-)

Change-Id: I51069235693ee9fd055d11e62f8f152ff7bc0210
Signed-off-by: scotthartbti <scott@ubuntu.com>

Conflicts:
	res/xml/blacklist_setting.xml