Bluetooth: SDP: Server: Support ServiceSearchAttributeRequest

This change adds support for handling Service Search Attribute
Requests.

> ACL data: handle 256 flags 0x02 dlen 24
    L2CAP(d): cid 0x0040 len 20 [psm 1]
        SDP SSA Req: tid 0x0 len 0xf
          pat uuid-16 0x1002 (PubBrwsGrp)
          max 65535
          aid(s) 0x0000 - 0xffff
          cont 00
< ACL data: handle 256 flags 0x00 dlen 109
    L2CAP(d): cid 0x0040 len 105 [psm 1]
        SDP SSA Rsp: tid 0x0 len 0x64
          count 97
          record #0
              aid 0x0000 (SrvRecHndl)
                 uint 0x10000
              aid 0x0002 (SrvRecState)
                 uint 0x0
              aid 0x0006 (LangBaseAttrIDList)
                 < uint 0x656e uint 0x6a uint 0x100 >
              aid 0x0005 (BrwGrpList)
                 < uuid-16 0x1002 (PubBrwsGrp) >
              aid 0x0001 (SrvClassIDList)
                 < uuid-16 0x111f (Handsfree AG) uuid-16 0x1203 (Audio)
              aid 0x0004 (ProtocolDescList)
                 < < uuid-16 0x0100 (L2CAP) > <
                 uuid-16 0x0003 (RFCOMM) uint 0x3 > >
              aid 0x0100 (SrvName)
                 str "HFP AG Service"
              aid 0x0311 (SuppFeatures)
                 uint 0x0
          cont 00

Change-Id: Ib742b09b70271f79aa6462acce25f4c08a9e1a15
Signed-off-by: Kaustav Dey Biswas <kaustav.d.biswas@intel.com>
Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>