Settings: Avoid possible NPE if resolve infos return null.

 When querying for intent services to handle accessiblity, printing,
 or IME, its possible that the device doesn't have anything available
 at the given moment to handle the query due to either the default
 application being moved to or from sdcard, or just not being present
 on the device.

 TICKET: CYNGNOS-279

Change-Id: Ic264b27deee9eae4329d6b5827976cdb40986622