Bluetooth: SDP: Server: Handle Service Search request

Handles the service search request from peer, parses the service
search pattern (which is a data elem seq of uuids to be searched)
and populate the uuids.

This also populates the registered records which will be filtered
based on the uuids in the pattern (which will be done in the subsequent
patch).

Change-Id: I9a232a7cfdd159325214ed13e98cc20be39a2e3b
Signed-off-by: Kaustav Dey Biswas <kaustav.d.biswas@intel.com>
Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>