quickcontact: fallback to default secondary action drawable

If the resource package doesn't have a valid resource drawable, then fallback
to default drawable.

Change-Id: I92d36b9e4ac3a444718d924c0c992325185d80a9
JIRA: CYAN-4350
Issue: https://jira.cyanogenmod.org/browse/CYAN-4350
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>